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Frequently Asked Questions (FAQs)

Have a question about Electromagnetic Radiation (EMF)? Want to know how to use DefenderShield® products? Search our extensive knowledge-base to find your answer.

Questions About Us:

Learn About DefenderShield

What is the difference between DefenderShield and other EMF companies?

Founded by a former telecommunications engineer and executive, Daniel T. DeBaun, DefenderShield® has been recognized in the industry as the trusted worldwide leader in EMF radiation protection and education.

Over the past decade, our mission has been to support consumers in living healthy lives by sharing our knowledge of EMF radiation and its potential health issues while providing the most effective EMF shielding solutions possible.

DefenderShield technology is the only solution on the market that utilizes multiple layers of materials to conduct, absorb and dissipate the radiation that would otherwise be hitting your head and body. It blocks up to 99.9% of Radio Frequency (RF) and up to 98.25% of Extremely Low Frequency (ELF) EMF emissions from 0-90 GHz, which encompasses all frequencies used in the current 5G network. No other company’s products protect this full range of EMF emissions. Our radiation shielding has been tested by an independent laboratory.Read more about DefenderShield’s story on how we got started, and be sure to read Radiation Nation, a complete guide book to EMF radiation protection and safety, written by Daniel and Ryan DeBaun.

Does DefenderShield have independent testing?

Yes, the Electromagnetic Radiation (EMR) shielding effectiveness of the DefenderShield technology has been conducted by an independent FCC-certified testing laboratory. The complete report can be viewed here.

What is DefenderShield EMF radiation blocking technology made out of?

DefenderShield® technology utilizes a unique, multi-layered approach to protect you from electromagnetic radiation (EMF) emitted by everyday devices.  Each layer is composed of non-toxic, human-safe materials specifically chosen to block a wide range of EMF frequencies (0-90GHz)

DefenderShield® technology conducts, absorbs and dissipates EMF radiation to ensure complete protection. Modern science knows of no other way of shielding this broad spectrum range of EMF radiation emitted from electronic devices such as laptops, tablets and cell phones, without utilizing a multi-layer solution.

Questions About Our Products:

DefenderPad Laptop EMF Radiation + Heat Shield

What is the difference between the DefenderPad and the Sleeve?

Both the DefenderPad and Laptop Sleeve offer industry-leading protection with Ultra Armor+ shielding, blocking 99% of EMF radiation (0-90GHz) for your laptop. Here's a breakdown to help you decide:

  • DefenderPad:
    • Ideal for dedicated workspaces (offices, desks).
    • Rigid design with a cooling silicone top surface for lap comfort.
    • Not portable due to size and weight.
  • Laptop Sleeve:
    • Flexible and portable for on-the-go use.
    • Offers lap protection during use and storage protection during travel.
    • Available in 15” and 17” models.

How long does the shielding in my DefenderPad last? When do I need to replace it?

DefenderShield technology is designed for long-lasting performance. The shielding material in your DefenderPad does not degrade over time, so it continues to effectively conduct, absorb, and dissipate EMF radiation.

For more details on how our technology works, visit the "How it Works" section on our website: https://www.defendershield.com/protection/

Can the DefenderPad be cleaned?

For your DefenderPad, gentle cleaning helps maintain their appearance. Here's what you'll need:

  • Mild detergent
  • Soft cloth or cotton balls
  • Clean water

Cleaning Instructions:

  1. Mix a mild detergent solution:  Add a small amount of mild detergent to a bowl of clean water.
  2. Dampen the cloth:  Dip your cloth into the solution and wring it out thoroughly to ensure it's slightly damp, not wet.
  3. Wipe down the surfaces:  Gently wipe the exterior surfaces of your DefenderPad or Laptop Sleeve with the damp cloth.
  4. Air dry completely:  Allow the pad or sleeve to air dry completely before using it again. 

Important Tips:

  • Avoid using harsh chemicals, solvents, or abrasive cloths, as they can damage the materials.
  • Never submerge your DefenderPad or Laptop Sleeve in any liquid.

Which side goes up?

The DefenderPad Laptop and Heat Shield provide EMF radiation protection regardless of which side faces up.  However, we designed the DefenderPad with a dual benefit:

  • Smooth Bottom: Ensures compatibility with various surfaces.
  • Silicone Top: Provides a non-slip grip to keep your device stable during use.

We recommend placing the silicone top facing upwards for optimal device stability.  This way, you can focus on work or entertainment without worrying about your laptop slipping.

Where does the radiation emit from on my laptop?

EMF radiation from your device is emitted omni-directionally (in all directions), similar to how sunlight spreads. This means radiation comes from the back, screen, and sides of the device.

Laptop EMF Radiation Protection + Safety Sleeve

What is the difference between the DefenderPad and the Sleeve?

Both the DefenderPad and Laptop Sleeve offer industry-leading protection with Ultra Armor+ shielding, blocking 99% of EMF radiation (0-90GHz) for your laptop. Here's a breakdown to help you decide:

  • DefenderPad:
    • Ideal for dedicated workspaces (offices, desks).
    • Rigid design with a cooling silicone top surface for lap comfort.
    • Not portable due to size and weight.
  • Laptop Sleeve:
    • Flexible and portable for on-the-go use.
    • Offers lap protection during use and storage protection during travel.
    • Available in 15” and 17” models.

How long does the shielding in my DefenderPad last? When do I need to replace it?

DefenderShield technology is designed for long-lasting performance. The shielding material does not degrade over time, so it continues to effectively conduct, absorb, and dissipate EMF radiation.

For more details on how our technology works, visit the "How it Works" section on our website: https://www.defendershield.com/protection/

Can the Laptop Sleeve be cleaned?

For your Laptop Sleeve, gentle cleaning helps maintain their appearance. Here's what you'll need:

  • Mild detergent
  • Soft cloth or cotton balls
  • Clean water

Cleaning Instructions:

  1. Mix a mild detergent solution:  Add a small amount of mild detergent to a bowl of clean water.
  2. Dampen the cloth:  Dip your cloth into the solution and wring it out thoroughly to ensure it's slightly damp, not wet.
  3. Wipe down the surfaces:  Gently wipe the exterior surfaces of your DefenderPad or Laptop Sleeve with the damp cloth.
  4. Air dry completely:  Allow the pad or sleeve to air dry completely before using it again. 

Important Tips:

  • Avoid using harsh chemicals, solvents, or abrasive cloths, as they can damage the materials.
  • Never submerge your DefenderPad or Laptop Sleeve in any liquid.

Where does the radiation emit from on my laptop?

EMF radiation from your device is emitted omni-directionally (in all directions), similar to how sunlight spreads. This means radiation comes from the back, screen, and sides of the device.

ConcealShield® Cell Phone Faraday Travel Bag

If I put my cell phone in the ConcealShield®, will I receive phone calls?

If you would like to protect yourself from EMF radiation, but still receive phone calls or messages, place your cell phone in the front snap pocket or front mesh pocket. If your phone is placed inside the VELCRO® pocket, your phone will not receive a signal.

Will placing my device in the ConcealShield® faraday pocket drain the battery of my cell phone?

Ideally, you should turn your device off or put it in Airplane Mode before placing it inside the Faraday pocket (VELCRO® pocket) of the ConcealShield®. While your device is inside this pocket, it will constantly search for a connection to a cell tower and this may drain the battery.

We do not recommend leaving your device in the ConcealShield® overnight, or longer than a few hours without turning it off or putting it in Airplane Mode first.

Where in the ConcealShield® do I put my cell phone and other traceable items to block all signals?

Place your cell phone, credit cards, passport, IDs or any other traceable items inside the VELCRO® pocket and press to seal the closure. When placing your phone inside this pocket, we recommend putting it in airplane mode or turning it off to preserve battery life.

Blue Light Glasses

What wavelength do the DefenderShield® Blue Light Blocking Glasses protect from?

DefenderShield® Blue Light Blocking Glasses are designed to block blue light emitting from all digital screens and artificial light with wavelength intervals of 450-490 nm.

Do DefenderShield® Blue Light Blocking Glasses also block blue light from television screens?

Yes, you can experience the benefits of DefenderShield®  Blue Light Blocking Glasses while using them to watch television.Your television screen, just like computer and mobile device screens, emit blue light which has been proven to interfere with melatonin production and circadian rhythms. This has a negative impact on sleep patterns and is believed to contribute to various visual ailments.

Do DefenderShield® Blue Light Blocking Glasses protect against UVA and UVB rays?

DefenderShield® Blue Light Blocking Glasses are not designed to protect against UVA and UVB exposure.

Do DefenderShield® Blue Light Blocking help with sleep?

Yes. Blue light emitted from computer screens, mobile devices and televisions has been scientifically proven to interfere with melatonin production and circadian rhythm, thus, reducing your ability to attain a good night’s rest.

By using DefenderShield® Blue Light Blocking Glasses, you can maximize your sleep-wake circadian rhythm and reduce the impact of night-time scrolling on your body’s ability to produce melatonin to ensure a restful night’s sleep.

Phone Cases

What is the difference between the wallet case and the SlimFlip model?

Our wallet case offers superior protection with a detachable rubber nesting case featuring anti-shock corners. It also boasts 3 RFID-blocking credit card/ID slots for added convenience and security. This option is slightly thicker and wider for a more robust feel.

The SlimFlip model prioritizes a sleek, minimalist profile. The nesting case is built directly into the phone case for a compact and lightweight design. It features 1 card slot and secures without a magnet.

How do I use the case?

How to Use Your DefenderShield Case:

  1. Overall Protection: Keep the shielded front cover closed between your body and your device to prevent exposure to EMF radiation emissions.
  2. Talking: When taking a private call, hold the phone with the front cover closed to create a barrier between your head and the device. 
  3. Texting/Browsing: Flip the front cover of the case to the back (credit card slots facing your palm) to prevent direct bodily exposure while using the touchscreen.
  4. Storage: When carrying your phone in a pocket or bag, ensure the front cover faces your body for continued protection during transportation.

How do I clean the case?

Keeping Your DefenderShield Case Clean:

  1. Remove phone: Take your phone out of the case.
  2. Wipe the case:  Use a damp microfiber cloth (or alcohol wipes) with warm, soapy water (mild dish soap) to clean the outer surface.
  • If using soap and water, rinse the cloth well to remove soap residue before wiping.
  • For alcohol wipes, avoid excess and be careful around cutouts.
  1. Air dry completely: Let the case air dry fully before putting your phone back in. Moisture can damage your phone.

Avoid: Submerging the case or using harsh cleaners, aerosol sprays, solvents, or abrasives.

How to turn off 5G

While some devices allow disabling 5G connections, the specific steps can vary depending on your phone manufacturer and model.

Here are general guidelines, but it's recommended to consult your phone's user manual or contact your phone manufacturer/service provider for specific instructions:

  • Android phones: Look for settings related to "Mobile Networks" or "Cellular Data." There, you might find an option for "Network Mode" where you can select "LTE/3G/2G" (this disables 5G).
  • Apple iPhones: Go to "Settings" -> "Cellular" -> "Cellular Data Options" -> "Voice & Data." Here, you can choose "LTE" to disable 5G.

How does the shielding work?

Our cases utilize a proprietary, multi-layered shielding material scientifically tested to block up to 99% of EMF radiation across a wide range (0-90 GHz), including the entire 5G spectrum. 

Here's how it works:

  • Conducts, Absorbs, and Dissipates: The shielding conducts, absorbs, and dissipates incoming EMF radiation. Think of it like a net catching and redirecting the energy.
  • Advanced Materials: A complex mix of engineered alloys and nanotechnology is used to achieve this effect. Importantly, this doesn't interfere with your phone's signal transmission or reception.
  • Positioned for Protection: The shielding is strategically placed in the front cover, creating a barrier between you and your phone while still allowing cellular and WiFi signals to pass through.

EMF Protection + Radiation Blocking iPhone Case

How do I know which iPhone case to purchase for my phone?  

Our iPhone cases are model specific. To determine your specific model, you will need to access your device’s “Settings” followed by “General”. You will then select “About” or “About iPhone” and your model will be displayed at the top of the screen. 

How can I find my iPhone model?

To locate your model on our website, choose the corresponding model number (any iPhone 11 series phone whether it is the Pro, Pro Max or standard model) will be available under that Series listing on the website. For assistance with locating the correct model, we invite you to contact our customer service team for further support.

How do I get the case to stop pushing buttons on my iPhone? 

It may be possible to adjust the screen sensitivity of your device to prevent the case from making selections on your touch screen.  These settings can be located here: 

How to turn on 3D or Haptic Touch and adjust the sensitivity

  1. Go to Settings and tap Accessibility.
  2. Tap Touch, then tap 3D & Haptic Touch. Depending on the device you have, you might see 3D Touch or Haptic Touch only.*
  3. Turn on the feature, then use the slider to select a sensitivity level.

How does the phone stay in the case?

The case has a secure magnetic tab closure and utilizes a magnetic strip in the back cover.

What is the difference between the wallet case and the SlimFlip? 

Our wallet case offers superior protection with a detachable rubber nesting case featuring anti-shock corners. It also boasts 3 RFID-blocking credit card/ID slots for added convenience and security. This option is slightly thicker and wider for a more robust feel.

The SlimFlip model prioritizes a sleek, minimalist profile. The nesting case is built directly into the phone case for a compact and lightweight design. It features 1 card slot and secures without a magnet.

Universal EMF Protection + Radiation Blocking Cell Phone Case

Why is there no camera cut out?

Our Universal phone cases are designed to accommodate a wide range of devices and as such, we are unable to offer a camera cut out.  To take a photo with your device, simply break the magnetic connection with the back cover, take your photo/video and replace the device in the wallet case when complete.

How does the phone stay in the wallet case?

Our wallet case contains magnetic adhesives that adhere to your phone. This allows the magnetic strip in the back of the case to hold your device firmly in place.

Why is there no nesting to snap my phone into?

The Universal cases are designed to accommodate a wide range of devices rather than a model specific device (such as our iPhones). Due to the differences in size, button placement and manufacturing standards, we can not include a model specific nesting in our Universal phone cases. We provide metallic adhesives that can be attached to the phone. You may use an additional slim yet protective nesting to protect your phone before placing your phone inside the wallet case.

Can I use a wireless phone charger with the Universal case?

Our phone cases are designed to provide exceptional protection for your device, including shielding from harmful EMF radiation. However, this added layer of protection may interfere with wireless charging capabilities. 

To ensure optimal wireless charging, we recommend removing your phone from the case before placing it on your wireless charging station.  We also note that the use of wireless charging emits more EMF radiation into your environment than cabled charging and would recommend the use of a cable to reduce overall EMF exposure.

How do I know which size case I need for my phone?

Our product works perfect for daily use with most smartphone models. To ensure the best fit, please refer to the dimensions provided below and select a case that is equal to or larger than your device. 

By choosing a case that is the correct size or slightly larger, you can guarantee a snug and secure fit for your smartphone. 

*(see compatibility list)*

Specifications for Medium Case: 
Weight (oz): 5.7
Dimensions (in): 6.25 x 3.25 x .75
Compatible with phones up to 6 x 3.25 in.

Specifications for Large Case:
Weight (oz): 6
Dimensions (in): 6.6 x 3.5 x .75
Compatible with phones up to 6.5 x 3.2 in.

EMF Protection Blanket

How do you wash the DefenderShield® EMF Radiation Protection Blanket?

To maintain the effectiveness of the shielding material, we recommend gentle hand washing for your blanket. Here's how:

  1. Hand Wash: Use cold, soapy water and be gentle while cleaning. You may use mild detergent or specialized metallic fabric cleaner. 
  2. Air Dry: Hang the blanket to dry and DO NOT place the blanket in a dryer. 

Alternative Cleaning Option:

For easier care, consider using a duvet cover over your DefenderShield® blanket. This washable outer layer will protect the blanket itself, reducing the frequency of hand washing needed. Plus, the duvet cover won't interfere with the shielding effectiveness of the DefenderShield® blanket underneath.

Is the DefenderShield® EMF Radiation Protection Blanket beneficial for air travel?

Absolutely! The DefenderShield® blanket is a perfect travel companion for several reasons:

  • Blocks EMF Radiation: It shields you from Radio Frequency (RF) radiation emitted by the WiFi and nearby devices in the airplane environment, offering peace of mind and reduced EMF exposure.
  • Comfort and Warmth: Made with a bamboo and cotton outer shell, the blanket provides cozy comfort and warmth during your flight.
  • Portable: Our small blanket measures 35” x 36” for easy, packable transportation.

What are the sizes and are the blankets heavy?

Our blankets are sized to cover the top of the mattress with no overhang to reduce both the weight and cost.  Sizing specifications are as follows:

Small Blanket (36″ x 35″):
Weight: 1.38 lbs
Dimensions: 36 x 35 x .3 in

Medium Blanket (75″ x 53″):
Weight: 4.5 lbs
Dimensions: 75 x 53 x .3 in

Large Blanket (80″ x 60″):
Weight: 5.1 lbs
Dimensions: 80 x 60 x .3 in

X-Large Blanket (84″ x 75″):
Weight: 7.3 lbs
Dimensions: 84 x 75 x .3 in

How do the blankets work?

Our blankets act as a shield to protect you from Radio Frequency (RF) radiation emitted by electronic devices, like laptops, tablets, and even airplane Wi-Fi. They work differently than a metal conductor, which would block all signals entirely.

Here's how:

  • Shielding, Non-Absorbing: The shielding encapsulated in our blankets prevents EMF radiation from passing through. It does this by acting as a floating ground, by providing a resistive path that forces the energy to take a longer, more indirect path. 
  • Think Umbrella, Not Wall: Imagine an umbrella that significantly lessens the amount of rain reaching you, but doesn't stop it completely. Similarly, the blanket reduces exposure, but doesn't eliminate EMF radiation.
  • Dissipation, Not Storage: Some of the weakened EMF radiation is converted into a very small amount of thermal energy which dissipates within the shielding material itself.

Why does the blanket only cover the top of the bed?

Targeted Protection, Reduced Cost: We've opted for a unique size that covers the top of your mattress rather than a traditional bed size. This targets the areas of your body most vulnerable to EMF radiation during sleep and allows us to offer a lighter, more affordable product. While it may not fully drape over the sides of your bed, it prioritizes protection and value.

Cell Phone EMF Protection + Radiation Blocking Pouch

Will I still receive calls while my phone is in the DefenderShield® EMF Protection Pouch?

Yes, the EMF shielding material is built into the backside of the DefenderShield® EMF Protection Pouch to protect you from harmful emissions. It blocks up to 100% of Radio Frequency (RF) radiation emitted by your device without affecting cellular service or connectivity.

How can I protect myself while on a cell phone call when my device is inside the DefenderShield® EMF Protection Pouch?

Our DefenderShield® EMF Free Air Tube Earbuds are the perfect accessory to use with the DefenderShield® EMF Protection Pouch. Simply plug the EMF Free Air Tube Earbuds into your device, place your device in the EMF Protection Pouch, and you’re protected for an on-the-go call.

How does the DefenderShield® EMF Protection Pouch protect me?

Our shielding material is built into the back side of the DefenderShield® EMF Protection Pouch. When carrying the EMF Protection Pouch, place the back side facing the body to shield you from Radio Frequency (RF) radiation emissions to significantly reduce your overall exposure.

EMF-Free Headphones

Do I need an adaptor and what type do I need?

3.5 mm jack version:

No adapter is needed if your device has a standard 3.5mm headphone jack.

If your device lacks a headphone jack, you'll need an adapter to use our headphones. The type of adapter depends on your device's charging port:

  • Apple devices (iPhones): Lightning adapter
  • Android devices: USB-C dongle

These adapters connect to your device's charging port and provide a 3.5mm jack for your headphones.  *For optimal compatibility, we recommend using original manufacturer adapters.

USB-C version:

No adapter is needed if your device has a USB-C port for headphones, commonly found on newer phones. These USB-C headphones are directly compatible with:

  • iPhone 15 and later models
  • Most Android phones

If your device has a different port (like the older 3.5mm jack), you'll need a separate adapter to use these headphones.

What is included with the earbuds?

  • Hard Carrying Case: Protects your earbuds when not in use.
  • Ear Tips (6 Pairs):
    • 2 Styles: Choose between "Sport Tips" with a secure ear hook and "Round Tips" for a traditional fit.
    • 3 Sizes (Small, Medium, Large): Find the perfect fit for your ears for optimal comfort and sound quality.
  • 2 Clips: Attach the clips to the earbuds for additional security during workouts or active use.

How do I change the ear tips?

  1. Removing Current Tips: Pinch the current silicone tip firmly and pull it straight down until it detaches from the earbud.
  2. Replacing Round Tips:
  • Fold the top of the earbud back slightly to expose the stalk.
  • Push the new round tip onto the earbud with firm pressure, twisting slightly like screwing on a bottle cap.

3. Replacing Sport Tips:

    • Identify the left (L) and right (R) tips by the markings inside the larger opening.
    • Match the tip size (small/medium/large) to your preference.
    • Insert the earbud into the larger opening of the sport tip, ensuring the smaller opening is pressed firmly against the inside of the smaller hole on the earbud.
    • These tips rest in the upper ear cartilage, not inside the ear canal, using the small finger-like projection for a secure fit.

    For a visual guide, check out our video here: https://youtu.be/kNNR5bDIxus

      How do the controls work?

      The built-in audio controller on your headphones lets you:

      • Take Control of Calls: Answer or end calls without reaching for your phone.
      • Adjust Volume: Easily raise or lower the volume to your preferred level.
      • Manage Playback: Play, pause, or skip tracks with a simple press.

      Are these noise canceling headphones?

      Our headphones focus on noise reduction. We use physical design elements to create a barrier that passively reduces the amount of outside noise reaching your ears.

      True noise cancellation goes a step further by actively countering ambient noise. It does this with tiny microphones that pick up external noise, and then a speaker in the headphones generates sound waves that are the exact opposite of that noise. While effective, this technology can increase EMF radiation because the headphones become transmitters as well as receivers.

      Since our core mission is to minimize EMF exposure,  we currently focus on noise reduction for our headphones. This approach allows us to deliver excellent sound quality in a way that aligns with our commitment to your well-being.

      How do the headphones reduce EMF exposure?

      Our headphones incorporate two key features to minimize your exposure to EMF radiation:

      1. Air-Tube Technology: This innovative design creates distance between the sound source and your head. Sound is produced in speaker barrels located at the bottom of the air-tubes, and only sound waves travel through the tubes to your ears. This effectively keeps the source of EMF radiation further away from the head, reducing exposure.
      2. Shielded Wiring: The headphone wires are wrapped in a special nylon cord infused with copper. This copper-infused nylon acts as a shield, helping to prevent EMF radiation emitted from the wires from leaking onto your body while you're using the headphones.

      Do you sell adaptors and if not where can I purchase an adaptor?

      Since our headphones prioritize broad compatibility, we don't include adapters in the packaging. However, these adapters are widely available depending on your phone type:

      • Apple Devices (iPhone 7 and earlier): A Lightning adapter is needed to connect the headphones to your phone's charging port. You can easily find these adapters at the Apple Store or other authorized retailers.
      • Android Devices: Most Android phones use a USB-C port for charging and audio. A USB-C to 3.5mm audio adapter can be found on Amazon, electronic stores, or even your phone's carrier store.

      How do I clean the headphones?

      To maintain optimal sound quality and hygiene, it's important to clean your headphones regularly. Here's a safe and effective method:

      What You'll Need:

      • A microfiber cloth (ideally, one intended for cleaning electronics)
      • Isopropyl alcohol wipes or antibacterial wipes - Optional

      Cleaning Instructions:

      1. Power Off and Disconnect:  Disconnect your headphones from any device.
      2. Dry Cleaning:  Use the dry microfiber cloth to gently wipe down the ear pieces and other exterior surfaces. This removes dust, dirt, and loose particles.
      3. Spot Cleaning (Optional):  For stubborn grime or earwax buildup, slightly dampen a corner of the microfiber cloth with clean water. Wring it out thoroughly to ensure it's barely damp, not wet. Wipe down the affected areas gently.
      4. Isopropyl Alcohol wipes or Antibacterial wipes (Optional - Use with Caution):  If you prefer a more thorough disinfection, you can use isopropyl alcohol or antibacterial wipes.  Important: Never apply isopropyl alcohol directly to the headphones.  Moisten a cotton swab with a small amount of alcohol and carefully clean crevices or areas with heavy buildup. Avoid excessive use of cleaning solution, and never submerge the headphones in any liquid.
      5. Air Drying:  Allow the headphones to air dry completely before using them again. This can take 15-30 minutes.

      Additional Tips:

      • Avoid using harsh chemicals, solvents, or abrasive cleaning cloths, as they can damage the headphone materials.
      • Don't submerge the headphones in any liquid, even for cleaning.
      • Clean the ear buds or cups regularly, especially if you use them during workouts or for extended periods.

      By following these steps, you can keep your headphones clean and ensure they continue to deliver excellent sound quality.

      Tablet Case

      How do I use the DefenderShield® Universal Tablet & iPad® Radiation Protection Case?

      1. Upon opening the case, verify it is the correct size for your tablet/iPad®.
      2. Place all four corners of your tablet/iPad® into the plastic corner clips. They should hold your device in place securely. Shielding is located in both the front and back sides of the case so you are protected while using your tablet on your lap.
      3. Use one of the two grooves on the inside front cover to stand the tablet/iPad® for landscape viewing. For portrait viewing, use the 360º swivel mount to rotate the tablet/iPad®.

      Where is the shielding in the tablet case located?

      Our EMF Radiation Protection Universal Tablet Case offers comprehensive protection against EMF emissions in any position, thanks to strategically placed shielding:

      • Front Cover and Rotating Back Cover: Our case provides a barrier when the case is closed, blocking radiation from both sides of the tablet while not in use or during transportation.
      • Rotating Back Cover:  This cover houses shielding to protect you when the case is open.
        • Lap/Body Stand:  If you use the front cover as a stand while holding the tablet, the back cover shields your body from direct contact with radiation.
        • Flat on Lap/Body:  Even when the case lies flat with the back cover facing you, the shielding within this cover prevents radiation from reaching your body.

      In short, no matter how you use your tablet, the case is designed to keep you protected from EMF radiation.

      Is there a camera cutout?

      No, our tablet cases are designed to fit a wide range of devices and therefore don't have a dedicated camera cutout.

      EMF Radiation Protection Beanie Cap

      How do I wash my EMF Radiation Protection Beanie Cap?

      Washing Instructions for DefenderShield EMF Radiation Protection Beanie Cap

      Minimize Washing:

      Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

      Gentle Hand Washing Recommended (if needed):

      • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
      • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
      • DO NOT BLEACH.
      • Air-dry only. Do not tumble dry.

      For Long-Lasting Protection:

      • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

      Do these run big or small or true to size?

      Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

      • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
      • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

      What is the EMF Radiation Protection Beanie Cap made of?

      These beanies are made from a comfortable blend of materials:

      • 53% Cotton: Provides breathability and a soft feel.
      • 42% Silver Fiber: Offers EMF radiation protection and natural odor resistance.
      • 5% Nylon: Adds durability and helps the beanie keep its shape.

      EMF Radiation Protection Winter Beanie

      How do I wash my EMF Radiation Protection Winter Beanie?

      Washing Instructions for DefenderShield EMF Radiation Protection Winter Beanie

      Minimize Washing:

      Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

      Gentle Hand Washing Recommended (if needed):

      • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
      • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
      • DO NOT BLEACH.
      • Air-dry only. Do not tumble dry.

      For Long-Lasting Protection:

      • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

      Do these run big or small or true to size?

      Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

      • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
      • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

      What is the EMF Radiation Protection Winter Beanie made of?

      Our winter beanie is crafted from a warm and comfortable combination of materials:

      • 100% Acrylic Yarn: The outer shell is made from a soft and durable acrylic yarn that provides excellent warmth for winter weather.
      • Internal 100% Silver: This inner layer features 100% silver, offering natural odor resistance and temperature regulation to keep you feeling comfortable all winter long.

      EMF Radiation Protection Baseball Cap

      What is the sizing of the baseball cap?

      The DefenderShield baseball cap has the following specifications:

      Circumference (in): 18.5-23.5 inches 

      Weight (lb): 0.18

      What is the baseball cap made out of?

      • External Material: 90% Nylon, 10% Spandex
      • Internal Material: 100% Silver Shielding

      Can I adjust the sizing of the baseball cap?

      Yes. The cap is fully adjustable using a hook and loop strap closure.

      Why is there no hole above the adjustable band?

      There is no opening at the back of the hat to provide uninterrupted EMF shielding in the dome of the cap. This led us not to include an opening in the back.

      What kind of shielding is in the baseball cap?

      DefenderShield baseball cap contains our RF Wireless Advanced Shielding Technology. This is the gold standard for blocking the wireless EMF radiation emitted .Feel secure knowing that it blocks up to 99% of wireless (RF) signals up to 10 GHz, which includes low- and mid-band 5G frequencies used in most current 5G networks.

      EMF Radiation Protection Gloves

      How do I wash my EMF Radiation Protection Gloves?

      Washing Instructions for DefenderShield EMF Radiation Protection Gloves

      Minimize Washing:

      Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

      Gentle Hand Washing Recommended (if needed):

      • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
      • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
      • DO NOT BLEACH.
      • Air-dry only. Do not tumble dry.

      For Long-Lasting Protection:

      • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

      Do these run big or small or true to size?

      Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

      • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
      • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

      What are the EMF Radiation Protection Gloves made of?

      These gloves are crafted from a comfortable and functional blend of materials:

      • 74% Cotton: Provides breathability and a soft feel against your skin.
      • 23% Silver Fiber: Offers EMF radiation protection and natural odor resistance.
      • 3% Spandex: Adds a touch of stretch for a flexible and comfortable fit.

      EMF Radiation Protection Hooded Jacket

      How do I wash my EMF Radiation Protection Hooded Jacket?

      Washing Instructions for DefenderShield EMF Radiation Protection Hooded Jacket

        Minimize Washing:

        Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

        Gentle Hand Washing Recommended (if needed):

        • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
        • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
        • DO NOT BLEACH.
        • Air-dry only. Do not tumble dry.

        For Long-Lasting Protection:

        • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

        Do these run big or small or true to size?

        Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

        • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
        • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

        What is the EMF Radiation Protection Hooded Jacket made of?

        Our jacket combines functionality and comfort with its material blend:

        • Outer Shell (45% Rayon, 44% Nylon, 11% Spandex): This blend offers breathability for everyday wear and a touch of stretch for freedom of movement.
        • Inner Lining (100% Silver Fiber): The inner layer utilizes silver fiber technology, known for its EMF radiation protection and natural odor resistance.

        Does the EMF Radiation Protection Hooded Jacket increase EMF?

        The DefenderShield Jacket helps reduce your exposure to everyday EMF radiation.

        Our shielding material blocks EMF radiation (300Hz-10GHz) from reaching your body. This includes emissions from cell phones, Wi-Fi routers, and similar sources. For best results, keep the jacket between you and the EMF source.

        Avoid placing your phone or emitting device inside or under the jacket, as this will trap the EMF radiation emissions against the body.

        Do the EMF Radiation Protection Hooded Jacket block all of 5G?

        Our jackets use shielding that blocks a significant portion of 5G frequencies (up to 10GHz).

        However, 5G can use a wider range of frequencies (up to 90GHz). For blocking these higher frequencies, we recommend our Ultra Armor shielding products, like phone cases or wallpaper.

        You can find more details about our shielding effectiveness on our testing page: link to DefenderShield testing page: https://defendershield.com/testing.

        EMF Radiation Protection Scarf

        How do I wash my EMF Radiation Protection Scarf?

        Washing Instructions for DefenderShield EMF Radiation Protection Scarf

        Minimize Washing:

        Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

        Gentle Hand Washing Recommended (if needed):

        • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
        • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
        • DO NOT BLEACH.
        • Air-dry only. Do not tumble dry.

        For Long-Lasting Protection:

        • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

        What are the EMF Radiation Protection Scarves made of?

        Scarf Materials:

        • Grey & Sage Green Scarf: This scarf is made from a soft and breathable blend of 54% cotton and 46% silver fibers. The cotton provides a comfortable feel, while the silver fibers offer EMF radiation protection and natural odor resistance.
        • Rose Scarf: This scarf is crafted from a luxurious and functional blend of 47% polyester and 53% silver fibers. The polyester adds a touch of sheen and durability, while the silver fibers offer EMF radiation protection and natural odor resistance.

        EMF Radiation Protection Shorts

        How do I wash my EMF Radiation Protection Shorts?

        Washing Instructions for DefenderShield EMF Radiation Protection Shorts

        Minimize Washing:

        Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

        Gentle Hand Washing Recommended (if needed):

        • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
        • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
        • DO NOT BLEACH.
        • Air-dry only. Do not tumble dry.

        For Long-Lasting Protection:

        • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

        Do these run big or small or true to size?

        Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

        • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
        • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

        What are the EMF Radiation Protection Shorts made of?

        Our shorts feature a multi-layer construction for optimal comfort and functionality:

        • Outer Shell: 60% Modal and 40% Nylon provides a soft, breathable, and durable exterior.
        • Middle Layer: 100% Silver Fiber offers EMF radiation protection and natural odor resistance.
        • Inner Lining: 100% Viscose for a soft and gentle touch against the skin.

        EMF Radiation Protection Hooded Jacket

        How do I wash my EMF Radiation Protection Hooded Jacket?

        Washing Instructions for DefenderShield EMF Radiation Protection Hooded Jacket

          Minimize Washing:

          Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

          Gentle Hand Washing Recommended (if needed):

          • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
          • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
          • DO NOT BLEACH.
          • Air-dry only. Do not tumble dry.

          For Long-Lasting Protection:

          • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

          Do these run big or small or true to size?

          Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

          • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
          • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

          What is the EMF Radiation Protection Hooded Jacket made of?

          Our jacket combines functionality and comfort with its material blend:

          • Outer Shell (45% Rayon, 44% Nylon, 11% Spandex): This blend offers breathability for everyday wear and a touch of stretch for freedom of movement.
          • Inner Lining (100% Silver Fiber): The inner layer utilizes silver fiber technology, known for its EMF radiation protection and natural odor resistance.

          Does the EMF Radiation Protection Hooded Jacket increase EMF?

          The DefenderShield Jacket helps reduce your exposure to everyday EMF radiation.

          Our shielding material blocks EMF radiation (300Hz-10GHz) from reaching your body. This includes emissions from cell phones, Wi-Fi routers, and similar sources. For best results, keep the jacket between you and the EMF source.

          Avoid placing your phone or emitting device inside or under the jacket, as this will trap the EMF radiation emissions against the body.

          Do the EMF Radiation Protection Hooded Jacket block all of 5G?

          Our jackets use shielding that blocks a significant portion of 5G frequencies (up to 10GHz).

          However, 5G can use a wider range of frequencies (up to 90GHz). For blocking these higher frequencies, we recommend our Ultra Armor shielding products, like phone cases or wallpaper.

          You can find more details about our shielding effectiveness on our testing page: link to DefenderShield testing page: https://defendershield.com/testing.

          EMF Radiation Protection Sleep Mask

          How do I wash my EMF Radiation Protection Sleep Mask?

          Washing Instructions for DefenderShield EMF Radiation Protection Sleep Mask

          Minimize Washing:

          Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

          Gentle Hand Washing Recommended (if needed):

          • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
          • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
          • DO NOT BLEACH.
          • Air-dry only. Do not tumble dry.

          For Long-Lasting Protection:

          • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

          What are the EMF Radiation Protection Sleep Masks made of?

          Our sleep masks are designed for both comfort and EMF shielding efficacy:

          • Outer Shell: Made from 100% polyester, this layer provides a soft and smooth feeling against your skin.
          • Inner Shielding: This inner layer is 100% silver, which effectively blocks EMF radiation and light to ensure an ideal sleeping environment. Silver also offers natural antimicrobial properties.

          EMF Radiation Protection Hooded Jacket

          How do I wash my EMF Radiation Protection Hooded Jacket?

          Washing Instructions for DefenderShield EMF Radiation Protection Hooded Jacket

            Minimize Washing:

            Silver's natural anti-bacterial and anti-odor properties help keep your garments fresh, allowing for less frequent washing.

            Gentle Hand Washing Recommended (if needed):

            • To preserve the shielding material, handwashing is recommended. Spot cleaning is ideal for minor blemishes.
            • Use lukewarm water below 30°C (86°F) with a neutral laundry detergent.
            • DO NOT BLEACH.
            • Air-dry only. Do not tumble dry.

            For Long-Lasting Protection:

            • Avoiding machine washing and drying helps maintain the integrity of the precious metallic fibers, preserving their effectiveness over time.

            Do these run big or small or true to size?

            Our clothing is designed to fit true to size based on our size chart.  Here's how to ensure the perfect fit:

            • Size Chart: We recommend using our size chart as a guide. You'll find detailed measurements for each size to help you find the best fit.
            • Measure Yourself: For ultimate accuracy, grab a measuring tape and take your measurements. This will ensure the most precise size for comfort.

            What is the EMF Radiation Protection Hooded Jacket made of?

            Our jacket combines functionality and comfort with its material blend:

            • Outer Shell (45% Rayon, 44% Nylon, 11% Spandex): This blend offers breathability for everyday wear and a touch of stretch for freedom of movement.
            • Inner Lining (100% Silver Fiber): The inner layer utilizes silver fiber technology, known for its EMF radiation protection and natural odor resistance.

            Does the EMF Radiation Protection Hooded Jacket increase EMF?

            The DefenderShield Jacket helps reduce your exposure to everyday EMF radiation.

            Our shielding material blocks EMF radiation (300Hz-10GHz) from reaching your body. This includes emissions from cell phones, Wi-Fi routers, and similar sources. For best results, keep the jacket between you and the EMF source.

            Avoid placing your phone or emitting device inside or under the jacket, as this will trap the EMF radiation emissions against the body.

            Do the EMF Radiation Protection Hooded Jacket block all of 5G?

            Our jackets use shielding that blocks a significant portion of 5G frequencies (up to 10GHz).

            However, 5G can use a wider range of frequencies (up to 90GHz). For blocking these higher frequencies, we recommend our Ultra Armor shielding products, like phone cases or wallpaper.

            You can find more details about our shielding effectiveness on our testing page: link to DefenderShield testing page: https://defendershield.com/testing.

            Radiation Nation: The Fallout of Modern Technology

            Is there an update to this book? 

            There are no current updates to this book, but we invite you to sign up for our newsletter at https://defendershield.com/newsletter to keep up to date on the latest data, science and technology from DefenderShield.

            Where is this book available?

            Physical copies of Radiation Nation: The Fallout of Modern Technology are available on our website with digital versions available for Kindle, Nook and in the app stores.

            Is there an audio version of this book?

            Yes. Radiation Nation: The Fallout of Modern Technology is available on Audible and in the app stores.

            What is this book about?

            Radiation Nation: The Fallout of Modern Technology is a layman’s guide to EMF radiation. Learn how EMF radiation is emitted and discover common-sense ways to reduce exposure at home, work, school, and on the go.

            5G EMF Radiation Protection Wallpaper

            What does this wallpaper block? 

            Our DefenderShield Wallpaper can help protect your body from 5G and other wireless EMF radiation emitted by exterior transmitters. The wallpaper creates a conductive barrier between you and EMF-emitting transmitters such as a 5G cell phone tower. Our wallpaper effectively attenuates frequencies from 300Hz-40Ghz.

            How big is the wallpaper?

            You can order our wallpaper by yards: 34" x 36".

            How is this wallpaper installed?

            It is our recommendation that the product be installed by professional wall covering personnel to avoid any potential DIY-related issues. To ensure you purchase the correct amount of removable wallpaper, carefully measure the space you plan to cover. The industry standard is to add 15% to the area of the measured space.

            Please note the following helpful tips:

            • Peel-and-stick wallpaper typically adheres to walls with a smooth texture and an eggshell, satin, or semi-gloss finish.
            • Walls must be properly prepped, primed, clean and dust-free prior to installation.

            Specifications:
            Product delivered rolled around a 3” cardboard core
            Minimum roll length of 1 yard (34″ x 36″)
            Full width of 1 yard (34″ x 36″)

            DefenderShield EMF Home Protection wallpaper is not covered by the DefenderShield Return Policy or One Year Limited Warranty.

            How much wallpaper do I need for my project? 

            To ensure you purchase the correct amount of removable wallpaper, carefully measure the space you plan to cover. The industry standard is to add 15% to the area of the measured space.

            Can I make a “Faraday room” out of wallpaper?

            Yes! Our shielding is ideal for creating an RF quiet “Faraday room”.  To accomplish this, we have curated the following basic steps. 

            First, locate the space you wish to designate, keeping in mind that small spaces such as closets or interior rooms will be easiest to transform due to lack of openings. To prevent RF from entering the room, completely cover all walls as well as the floor and ceiling with our Ultra Armor wallpaper. 

            To ensure best performance, make sure to overlap all wallpaper edges by 6”, avoiding gaps. 

            Once completely covered, this will eliminate any RF frequency from 300Hz-40GHz from penetrating into the room.

            Questions About EMF Radiation:

            Electromagnetic Radiation (EMF) Information

            Is a WiFi the same as microwave and a Radio Frequency (RF) radiation?

            A WiFi signal transmits and receives information between your your electronic device and router to connect to the internet. WiFi, short for wireless fidelity, refers to a signal which operated at a few different frequencies.

            Generally speaking WiFi is typically used as a standalone term. The term microwave is a reference to a class of waves, referenced as a microwave range or spectrum of frequencies that the WiFi signal operates. For example, the WiFi signal from your laptop is often transmitted at 2.4 GHz, a frequency found within the microwave range, or spectrum of 300 MHz to 300 GHz. This 2.4 GHz frequency is also within the same spectrum of what is called the Radio Frequency (RF) range, 3 KHz – 300 GHz. As you may notice, the RF is simply a slightly more broad frequency spectrum than the microwave range. All of the terms are often used interchangeably.

            What are low frequency magnetic fields?

            Electric fields occur when positive or negative electrical charges are present and apply forces on other charges within the fields. The fields and their strength are measured in volts per meter (V/m). Active electrical wires produce electric fields, as do almost all electric powered devices. The field exists even when there is no current flowing. When the voltage increases, so does electric field surrounding the device. When moving away from the source of the field, the field strength is reduced.

            Magnetic fields are created from electric charges. Their strength is measured in amperes per meter (A/m). Electromagnetic Fields (EMFs) also have related measurements which identify the flux density, expressed in microtesla, µT. When current is increased, the strength of the magnetic field increases. Magnetic fields are not commonly blocked with everyday materials.

            What is an Electromagnetic Field (EMF)?

            Electromagnetic Fields (EMF) are omni-directional (moves in all directions) waves generated from electrically powered devices in the form of an electrical energy with a magnetic field. EMFs are also known as Electromagnetic Radiation (EMR).

            Moving closer to the source of the waves increases the magnetic field intensity. A magnetic field cannot be felt, seen, or heard. Although the earth creates a magnetic field, EMFs also emanate from electrical devices such as computers, tablets, cellphones, radios, motors, home appliances, transformers, and electric power lines etc.

            What is the difference between Non-Ionizing and Ionizing radiation?

            Non-Ionizing radiation does not carry enough energy to break molecular bonds and ionize atoms. Example of non-ionizing are Extremely Low Frequency (ELF) and Radio Frequency (RF) radiation.

            Ionizing radiation is the type of radiation that carries enough energy to break bonds between molecules and ionize atoms. Examples of Ionizing radiation are the gamma rays emitted by radioactive materials, cosmic rays, and X-rays.

            Read more about Non-Ionizing radiation and Ionizing Radiation.

            Watch Below to Learn More About Non-Ionizing vs Ionizing Radiation

            What is the difference between Radio Frequency (RF) versus Extremely Low Frequency (ELF) shielding?

            Radio Frequency (RF) shielding is the reduction or elimination of high frequency signals up to 5 GHz. Materials shield RF frequencies by creating high conductivity with little or no magnetic permeability.

            Extremely Low Frequency (ELF) shields are highly permeable. ELF shields attract magnetic fields and divert the energy through them.

            How Do Electronic Devices Produce Electromagnetic Radiation (EMFs)?

            Types of Electromagnetic Radiation (EMFs) & How They are Created

            Electronics all fundamentally work the same way. They use an electric current passing through a circuit to perform a function.

            Electricity is an energy which must be harnessed to make it do what we want it to do. The electronic circuit is the basic unit through which electricity is transmitted. Scientists and engineers developed various ways to harness the power of electricity for humanity.

            Extremely Low Frequency (ELF) EMFs

            Electronic devices offer computing functions, phone calls, Internet connections, light up panels, and so many more capabilities.

            As a by-product of these functions operating, an electric current is generated that flows within and between components creating EMFs. This type of radiation is also known as Extremely Low Frequency (ELF).

            Radio Frequency (RF) EMFs

            Many electronic devices also communicate outside the device, transmitting communication signals from your device to other devices so you can talk on the phone or connect to the Internet via WiFi. These signals are called Radio Frequency (RF) signals or Microwave (MW) signals.

            RF signals can be transmitted at many different frequencies and power levels. A cell phone signal, for example, can travel several miles, while a WiFi signal transmits less than 100 feet.

            These varying distance capabilities require the electronics to generate differing power levels in order to accommodate the distances.

            What Does an Electromagnetic Field Look Like?

            As a result of electrons moving, electricity is generated in one direction and magnetism in another. This results in energy moving in two directions.

            The energy of the electricity moves on an x-axis, and perpendicularly at a 90 degree angle, a magnetic field is generated alongside it.

            Learn more about Electromagnetic Radiation (EMFs) in our Learn Section.

            Laptop EMF Radiation Emissions

            What health problems can be caused by using a laptop directly on your lap?

            Direct exposure to Extremely Low Frequency (ELF), Radio Frequency (RF) and Heat Radiation emissions can cause numerous health risks such as:

            • Fertility problems in men and women
            • DNA fragmentation (irreversible changes to the genetic code)
            • Toasted Skin Syndrome (Erythema ab igne), burns and rashes
            • Other serious health concerns

            When are laptop EMF radiation emissions most harmful?

            Laptops present the greatest potential for health risks when used directly against the body. With just one foot or more of distance between your laptop and your body, the most critical health risks of EMF emissions are substantially reduced by about 80%.

            Why is laptop radiation such a big deal now and it wasn’t 20 years ago?

            Twenty years ago computers were big and bulky. Once you put them down on your desk or on the floor, there was no need to move them. They emitted EMF radiation, but were relatively safe, because they were primarily used a safe distance away from the body.

            Today, computers and other devices are extremely portable and can fit on your lap or in the palm of your hand. Today’s devices have many times more computing power, and are used much closer to the body, thus creating health risks that did not exist 20 years ago.

            How can heat from a laptop harm me?

            Your laptop can get very hot and burn and/or irritate your skin, create fertility problems, and modify body cells, as well as cause other health issues.

            Does radiation emit from the screen, keyboard and sides of laptops?

            Radiation is generated by a laptop in all directions: bottom, top and sides. Radiation is considered most dangerous when in direct contact with the body, particularly when on the lap. The most harmful radiation emissions are emitted from the bottom of the laptop and travel in a downward direction. The DefenderPad® is designed to shield these emissions from touching the body.

            The screen and sides of a laptop tend to emit less radiation than the bottom. The radiation levels of the screen, keyboard and sides of a laptop are considered acceptable, low-rise emissions. As a rule of thumb, if you are one foot away from the source of the emissions, the dangers are greatly reduced. Even moving a laptop a few inches away from the lap reduces exposure to potentially harmful radiation.

            Tablet EMF Radiation Emissions

            Can I develop health problems from using a tablet or iPad®?

            Yes. Close exposure to tablet EMF radiation emissions can be a health risk. Tablet computers emit two types of EMF: Extremely Low Frequency (ELF) radiation and Radio Frequency (RF) radiation which includes WiFi, Bluetooth and cellular signals (if supported by your tablet) up to 10 GHz. DefenderShield® technology blocks up to 99% of EMF radiation from 0-10 GHz, which encompasses almost all frequencies used in the current 5G network.

            More and more, particularly in recent years, scientific studies have confirmed that EMF radiation can adversely alter the biological operations of the body. In more serious cases, exposure to EMF may create tumors, reduce sperm count, lead to cancer and other serious health concerns.

            Where does the radiation emit from a tablet or iPad?

            Radiation is generated by a tablet in all directions; back, screen and sides, with the most radiation emitted from the back and top of the tablet where the Radio Frequency (RF) transmitters are located. Exposure to radiation from the screen of a tablet is reduced because it is not touching the body directly.

            As a rule of thumb, when one foot away from the emitting source the dangers of these emissions are significantly reduced by as much as 80%.

            When are tablet & iPad® radiation emissions most harmful?

            A tablet & iPad® creates the most potential health risks when touching the body. As a rule of thumb, when one foot away from the emitting source the dangers of these emissions are significantly reduced by as much as 80%.

            What types of radiation do tablets and iPads® emit?

            Tablets and iPads® emit Radio Frequency (RF) and Extremely Low Frequency (ELF) radiation up to 10 GHz. DefenderShield® technology blocks up to 99% of EMF radiation from 0-10 GHz, which encompasses almost all frequencies used in the current 5G network. Tablets also generate heat radiation, but less than a laptop.

            Cell Phone EMF Radiation Emissions

            Where is cell phone radiation emitted?

            Radiation is generated by the cell phone in all directions; bottom, top, sides, front and back with the most radiation emitted from where the Radio Frequency (RF) transmitters are located.

            How far away from your bed should your phone be when you sleep?

            We suggest keeping your phone at least 4 feet away from your bed when you sleep.

            Placing your phone a few feet away will considerably reduce the amount of EMF radiation reaching your body. This also applies to tablets and laptops.

            What are the health risks related to using a cell phone?

            Cell phones emit Electromagnetic Fields (EMF) and direct exposure to these emissions can be a health risk. There are two types of EMF radiation emitted from cell phones: Extremely Low Frequency (ELF) radiation which is emitted from all electrical devices, and Radio Frequency (RF) radiation which includes cellular signals, WiFi and Bluetooth. More and more, particularly in recent years, scientific studies have confirmed that EMF exposure can adversely impact the biological operations of the body. In more serious cases, exposure to EMFs can lead to tumors, reduce sperm count and other serious health concerns.

            Cell phone radiation emissions present the greatest potential health risks when directly touching the body, especially the head, breasts and reproductive organs. Moving your cell phone away from your body just a few inches reduces health risks. When a cell phone is moved at least one foot away from the head or body, cell phone radiation is reduced by as much as 80%.

            How do I turn off 5G on my phone?

            If your phone accesses the 5G network (iPhone 12 series, Samsung Galaxy S21, Samsung Galaxy Note 20 Ultra, etc.) there is most likely a way to turn off 5G connections, put in place because your 5G signal might be slower than 4G/3G networks, and it can really drain your battery. When your iPhone is in low power mode, it will only connect to the 5G network for streaming 4k video. Apple outlines other ways you can disable the 5G network in your settings. Just navigate to Settings, Cellular, Cellular Data Options, and select Voice & Data. You can turn on LTE, which will use only 4G LTE even when 5G is available. You can also switch on low data mode, which helps reduce WiFi and cellular-data usage by pausing automatic updates and background tasks. For Samsung 5G phones, you should be able to navigate to Settings, Connections, Mobile Networks, then select Network Mode, where you can disable 5G by tapping LTE/3G/2G (auto connect), 4G/3G (auto connect), 3G only or 2G only. You can also use our DefenderShield iPhone 12 Series and Universal Series EMF Protection Cases that come with our BRAND NEW Ultra Armor™ Technology, the only shielding technology that can block the entire 5G spectrum.

            Why is cell phone radiation such a big deal now and it wasn’t 20 years ago?

            Twenty years ago, computers and telephones were big and bulky. Computers were placed on the floor and weren’t designed to move while phones were placed in a stationary base connected by cords and wires. They both emitted Electromagnetic Fields (EMFs), but were relatively safe because they were used a safe distance away from the body.

            Today, the computer and phone have merged into one device that fits in the palm of your hand. A smartphone is essentially a small computer, yet has many times the computing power of traditional computers. When turned on in your pocket or used against your head, the cell phone touches some of the most sensitive parts of the body. Now, cell phones are now used much closer to the body and for longer periods of time, creating more health risks than in the past.

            Do cell phones emit radiation when using WiFi?

            Yes. By default, WiFi is enabled on cell phones, so unless you turn this capability off, your WiFi processor will continue to send out wireless radio frequency (RF) signals in search of a WiFi router. This means even if you are not connected, your phone is emitting radiation in its search to connect to a router. When you are connected, your phone is still emitting radiation to maintain the signal, by sending constant pings to the router and back. We advise turning off your WiFi processor in settings when you are not actively searching for a WiFi signal.

            More Information: https://defendershield.com/how-wifi-works-wifi-6e-5g-future-internet-connections

            Which phone has the highest radiation emissions?

            All cellular devices are given a SAR (Specific Absorption Rate) rating, that measures how much RF energy is absorbed by a user’s head and body. This is measured in watts per kilogram, and is the maximum absorption the phone is capable of. With the hundred of different phone models, with new ones coming out all the time, it’s hard to say what phone has the highest SAR rating. Generally, iPhones have skewed higher on SAR ratings when compared with other phones. Samsung phones have a reputation for scoring low SAR ratings. We recommend checking your devices specific SAR rating, which can be checked in the phone’s user manual as well as on the manufacturer’s website and the FCC website. 

            What level of SAR is safe?

            SAR stands for Specific Absorption Rate, and is the rate that cell phone radiation emissions are absorbed into the body. The FCC states that an exposure limit of 1.6 watts per kilogram is an acceptable level. The limit in the European Union is 2.0 W/kg averaged over a larger mass. While this is the standard that has been accepted as safe, it is based on the assumption that EMF can only create thermal damage with chronic exposure. This ignores research showing that other biological effects are evident at lower levels of radiation exposure, below levels necessary for thermal heating. If these standards were to be updated, they might show a lower limit. For now, SAR thermal absorption standards are helpful for comparing radiation emissions between different devices, but it by no means establishes an absolute safe level for these emissions. Click HERE to read more about SAR and International Exposure Standards.

            What types of EMF radiation does a cell phone produce?

            When you use a cell phone directly against your head or next to your body, it exposes you to potentially harmful EMF radiation emission levels. These emissions include:

            1. Extremely Low Frequency (ELF) Radiation – coming from the battery powering your phone
            2. Radio Frequency (RF) Radiation – coming from your cellular data signals, your WiFi processor, and your Bluetooth processor
            3. Heat Radiation – a by-product of ELF and RF emissions

            How do I know if I have 5G on my phone?

            To access the 5G network, your device first needs to be either operating under a cellular data contract or using a fixed wireless cable system in your home. This rules out most tablets, laptops, WiFi routers, and other devices that are separate from your cellular plan. For devices that use cellular data, to connect to 5G they must have a 5G modem built into the device (some 5G trials and testing used separate modems that connected to your phone for 5G access). Integrated 5G modems didn’t come out until 2020, and are only in select phones (iPhone 12 series, Samsung Galaxy S21, Samsung Galaxy Note 20 Ultra, etc.). If you have an older phone model, your phone is not capable of connecting to the 5G network–and no, 5GE is not the 5G network, but instead a 4G LTE advanced signal that was called 5GE (5G Evolution) for marketing purposes. If your phone or fixed wireless system does connect to the 5G network, then it can access frequencies up to 100 GHz. However, the higher the frequency, the less distance the signal can travel, so carriers are mostly utilizing frequencies under 6 GHz (classified as low-band and mid-band) and rarely use high-band frequencies, also called millimeter waves.

            Questions About EMF Health Effects & Protection:

            EMF Health Effects

            I am hypersensitive to EMF radiation. Can I be affected by my wireless keyboard and mouse?

            Wireless keyboards and mice communicate via Bluetooth (or similar) technology. Although Bluetooth is a relatively low level of EMF radiation, it can affect the electrically hypersensitive, especially at close distances. However, wireless keyboards and mice are more of an irritant than an imminent health risk.

            How does radiation affect male fertility?

            Radiation can affect sperm motility and vitality, and cause DNA fragmentation. As an example, in one Argentinian study, scientists studied the effect of laptop Radio Frequency (RF) radiation and WiFi on human male sperm.

            • 25% of the sperm was no longer active compared to 14% from sperm samples stored at the same temperature over the same time period and away from the source of EMF.
            • 25% of the sperm was no longer active compared to 14% from sperm samples stored at the same temperature over the same time period and away from the source of EMF.

            Can 5G harm you? Is 5G safe?

            5G is the fifth generation cellular network. It offers frequencies 20 times faster and data transfer rates up to 100 times faster than 4G. Scientists are concerned that 5G’s higher frequency will not only exacerbate the already researched health effects of 4G, but create new problems of its own that won’t be seen until 5G is already in place. It’s shorter wavelength means that it won’t travel as far, and cannot penetrate our skin as deeply. However, the increased number of cell towers needed to support this network will definitely mean more exposure to our bodies, and a study showed that while the depth of penetration was less, the absorption rate, or SAR, was higher for the skin. 5G uses different technologies than previous networks that might make it more harmful even if it can’t travel as far. The coverage is beam-based in 5G, not cell based. Its rapid pulsations are more biologically active and can cause disease at a faster rate.

            Besides the health effects on humans, 5G could spell out potential disaster for bees, small animals, and crops, which might be much more affected by an artificial MMW frequency. It could also be trouble for international security, weather forecasting, and personal data privacy. Read more about 5G HERE.

            How do I know if I have EMF sensitivity? What are symptoms?

            EHS, or Electromagnetic Hypersensitivity Syndrome, is not currently a proper medical diagnosis in the U.S., but it is recognized by numerous organizations around the world. This exposure has been linked to ringing in the ears, tingling or burning skin, rashes, fatigue, concentration difficulties and a foggy brain, dizziness, nausea, headaches, and body aches. Extreme radio frequency (RF) exposure can also produce severe illness that mimics MS.

            If you think you suffer from EHS, there are easy ways you can reduce your exposure and you can see if that helps your symptoms.

            Learn more: https://defendershield.com/health-effect-ehs-radiation-sickness/

            Does EMF affect sleep?

            EMF radiation coming from the device can affect melatonin production and put the cells in your body in a state of stress, preventing you from getting good, restorative sleep. Other variables such as blue light, as well as technology offering stimulating content for the brain, come into play as well. 

            More Information: https://defendershield.com/health-effect-sleep/

            Do different forms of Electromagnetic Fields (EMFs) have different health concerns?

            An Electromagnetic Field (EMF) is defined by the frequency and corresponding wavelength. The frequency is expressed as cycles per second, or the number of oscillations. The corresponding term, wavelength, is the distance between each of the waves. It is also true that the higher the frequency, the shorter the wavelength. The human body reacts in different ways depending on the EMF frequency, and a higher frequency doesn’t necessarily mean that frequency is more harmful to the body. Devices and wireless signals emit frequency levels at the lower end of the electromagnetic spectrum, from 0 Hertz (Hz) to 100 Gigahertz (GHz). As the frequency level increases, this yields a higher absorption (SAR level) but a lower penetration into the body. This means that as frequency levels change, health concerns change.

            Can I develop health problems from using a tablet or iPad®?

            Yes. Close exposure to tablet EMF radiation emissions can be a health risk. Tablet computers emit two types of EMF: Extremely Low Frequency (ELF) radiation and Radio Frequency (RF) radiation which includes WiFi, Bluetooth and cellular signals (if supported by your tablet) up to 10 GHz. DefenderShield® technology blocks up to 99% of EMF radiation from 0-10 GHz, which encompasses almost all frequencies used in the current 5G network.

            More and more, particularly in recent years, scientific studies have confirmed that EMF radiation can adversely alter the biological operations of the body. In more serious cases, exposure to EMF may create tumors, reduce sperm count, lead to cancer and other serious health concerns.

            What are the health risks related to using a cell phone?

            Cell phones emit Electromagnetic Fields (EMF) and direct exposure to these emissions can be a health risk. There are two types of EMF radiation emitted from cell phones: Extremely Low Frequency (ELF) radiation which is emitted from all electrical devices, and Radio Frequency (RF) radiation which includes cellular signals, WiFi and Bluetooth. More and more, particularly in recent years, scientific studies have confirmed that EMF exposure can adversely impact the biological operations of the body. In more serious cases, exposure to EMFs can lead to tumors, reduce sperm count and other serious health concerns.

            Cell phone radiation emissions present the greatest potential health risks when directly touching the body, especially the head, breasts and reproductive organs. Moving your cell phone away from your body just a few inches reduces health risks. When a cell phone is moved at least one foot away from the head or body, cell phone radiation is reduced by as much as 80%.

            Protecting From Electromagnetic Radiation

            What level of SAR is safe?

            SAR stands for Specific Absorption Rate, and is the rate that cell phone radiation emissions are absorbed into the body. The FCC states that an exposure limit of 1.6 watts per kilogram is an acceptable level. The limit in the European Union is 2.0 W/kg averaged over a larger mass. While this is the standard that has been accepted as safe, it is based on the assumption that EMF can only create thermal damage with chronic exposure. This ignores research showing that other biological effects are evident at lower levels of radiation exposure, below levels necessary for thermal heating. If these standards were to be updated, they might show a lower limit. For now, SAR thermal absorption standards are helpful for comparing radiation emissions between different devices, but it by no means establishes an absolute safe level for these emissions. Click HERE to read more about SAR and International Exposure Standards.

            When are EMF radiation emissions most harmful?

            EMF radiation emissions coming from your cell phone, tablet, laptop, WiFi router, and other devices present the greatest potential health risks when directly touching the body, especially the head, breasts and reproductive organs. This is due to your body being a conductor. Moving your device away from your body, even by just a few inches, can exponentially reduce the health risks. As a rule of thumb, when a cell phone is moved at least one foot away from the head or body, cell phone radiation is reduced by 80%. When a device is 4 feet away, that exposure drops by 98%.

            Can Electromagnetic Fields (EMFs) be completely eliminated?

            No. There no known technologies that completely eliminate Electromagnetic Fields (EMFs), but they can however be blocked, redirected and absorbed.

            What are safe levels of Extremely Low Frequency (ELF) Electromagnetic Radiation (EMR) and Radio Frequency (RF) Electromagnetic Radiation (EMR) exposure?

            Health experts recommend limiting Extremely Low Frequency (ELF) Electromagnetic Radiation (EMR) exposure to below 2-4 milliGauss (mG) and Radio Frequency (RF) exposure to under .6 volts per meter (V/m). Emissions from laptops and tablets are typically 4-12x that amount.

            Does turning off WiFi reduce radiation?

            Turning off WiFi will reduce wireless radio frequency (RF) EMF radiation. However, make sure to turn off your WiFi router along with disabling the WiFi processor on your mobile devices. This is especially important at night, when you should either turn your router off or sleep with it at least 12 feet away. While your router emits EMF at a high power level (to travel across your house), your smart phone or tablet is constantly sending out signals to search for and connect to a nearby router, even if there aren’t any powered on nearby. So while turning off your WiFi is helpful if you are within 12 feet of the router, it’s not doing much if your phone and other devices are still right next to you sending out RF signals. Read this blog for more information on WiFi routers.

            Does airplane mode eliminate EMF radiation?

            Airplane mode prevents your device from searching for a wireless signal, eliminating radio frequency (RF) EMF radiation emitting from your device. You can still manually turn on your WiFi processor while in airplane mode, which will emit some RF to connect to the Internet. However, since cellular and Bluetooth signals remain off, your exposure to RF emissions is reduced. However, while RF emissions can be eliminated in airplane mode, Extremely Low Frequency (ELF) emissions still emit from your device, as long as it is plugged in or uses a battery (even when it’s off!). Read more about airplane mode HERE.

            Can Orgonite protect from EMF radiation?

            Orgonite is a man-made metaphysical substance that can be crafted from resinmetal shavings, and quartz. It is said to balance bio-energy, or a subtle life energy connecting and emitted by all living things. It is said to take in bad energy and replace it with good energy. This energy, Orgone, has not been able to be measured by scientific instruments (since it was first claimed to be measured by Wilhelm Reich, a student of Freud). Claims of decreased sensitivity to EMF radiation come from Orgonite sellers and users, as the rock can “recycle the negative EMF energy.” However, this transformation of energy doesn’t have a scientific backing, and there is no substantiated evidence of it’s efficacy. While we support holistic methods for detoxifying your body, even if Orgonite’s claims are true, it is not able to completely block EMF radiation from entering your body. Read HERE for more information.

            What is the best EMF protection for cell phones?

            Turning off your phone, or turning off Wi-Fi and Bluetooth when not in use can reduce EMF frequencies that are emitting from your phone. Keeping your cell phone away from your head when possible and distancing it from your body can reduce the amount of EMF frequencies that could otherwise affect vulnerable organs. DefenderShield EMF Blocking Cases and other EMF gear can form a physical shield that is scientifically engineered to block EMF frequencies. If you place the shield in between you and your cell phone or other mobile device, 99% of the frequencies hitting the shield will be blocked from direct skin contact with your body. Stickers, pendants, stones, and other forms of EMF protection have no scientific basis, and are not able to be measured by scientific instruments.

            How can radio frequency (RF) exposure be reduced?

            Radio frequency radiation, or RF, is a type of EMF radiation coming from wireless devices and networks. It refers to any signal being transmitted through the air, and includes cellular data, WiFi, and Bluetooth. To reduce these signals in your everyday life, try turning off devices when you aren’t using them, using airplane mode whenever possible on your phone, unplugging routers and using wired Ethernet cables to connect to your computer, TV, or other wireless devices. Since RF exposure comes from wireless connections, wire everything that you can to reduce RF exposure. This includes speakers, keyboards, gaming controllers, monitors, etc. Additionally, DefenderShield EMF Protection Products all block RF frequencies when work, school or life demands screen time.

            What material can block EMF?

            EMF radiation is a range of electromagnetic frequencies coming from electronic devices. It includes wireless radio frequency (RF) radiation, which ranges from 300 Hz up to 100 GHz, and extremely low frequency (ELF) radiation, which ranges from 0-300 Hz. Many materials are capable of conducting wireless radiation (RF), including silver, copper, aluminum, and other metals. However, they all have different properties, and conduct different frequencies of EMF differently. Aluminum, or tin, is a pretty effective and affordable option for conducting EMF. ELF’s extremely long wavelength means it can go through materials that RF cannot. DefenderShield’s Advanced Technology Shielding contains multiple alloys and materials that can absorb, conduct, and dissipate EMF emissions, with many products capable of blocking ELF as well as RF. Our shielding prevents reflection of conducted waves to make it the safest and best shielding available.

            How do I reduce EMF radiation in my body?

            While there are a number of ways to reduce EMF radiation in your environment to reduce your exposure, there are also many ways to detox your body from EMF and prevent EMF from affecting you. Grounding, or connecting your conductive body to the Earth or a floating ground, can help clear your body of positive ions, also called free radicals, which are produced excessively when exposed to EMF radiation. Drinking a lot of water will ensure that your cells are working as efficiency and effectively as they can to help reduce the stress response EMF imparts on the cell. Keeping your body’s minerals, nutrient, and hormones balanced can also be an effective way to combat toxins like EMF. Meditation and other mindfulness techniques can help build the resiliency of your cells in your body.

            Miscellaneous:

            Related Topics

            What is an earthing ground?

            An earthing ground is a “connection to ground” for static electricity found in a room and around electronic devices. Electronic devices that plug into a wall socket have a grounding path to earth ground provided within a standard wall socket. The static electricity looks for the quickest path to ground which an earthing cable may provide. Occasionally, the earthing cable ground is used for electrically sensitivity people and extra device protection.

            An earthing ground is NOT an conductive path for the electromagnetic emissions from laptops, tablets and cell phones. These devices emit Extremely Low Frequency (ELF) or Radio Frequency (RF) EMF radiation emissions. ELF or RF emissions will not travel the conductive path of an earthing ground.

            An earthing cable will not provide any shielding protection from EMF radiation. That is what the DefenderShield® is designed to accomplish. There is very little static electricity emitted or accumulated by electronic devices because they typically self-ground. Static electricity poses no imminent health risk, but maybe a slight irritant for the electromagnetic hypersensitive.

            What can I use to protect my family from the WiFi router in our home?

            The best way to limit your exposure to WiFi is creating distance between yourself and the router. We recommend the router be placed as far a distance away as possible from the main living areas and bedrooms.

            We recommend placing your WiFi router at least 10 feet away at a minimum from where you do daily activities.

            WiFi uses radio waves and these signals follow what is known as the inverse square law. This means that as you get further away from the source, the intensity of the energy decreases. In the case of a WiFi router, if you were to double your distance from it, you would only be exposed to about a quarter of its energy. Even at a relatively close distance like 10 feet away, the intensity of the the emissions are dramatically reduced.

            You may also want to turn off your router when not using it, or use wired Ethernet connections. You may also benefit from using a timer to turn off your router in the evening and back on in the morning.

            Is static electricity harmful?

            There is very little static electricity emitted or accumulated by electronic devices because they are typically self-ground. This static electricity poses no imminent health risk, but may be a slight irritant for electromagnetic hypersensitive individuals.

            What are DC and AC magnetic fields?

            Yes. Direct Current (DC) magnetic fields do not vary because the power source is constant. Alternating Current (AC) magnetic fields are created by an alternating power source generated at a given frequency. Almost all house and commercial power is AC, which is at 60 Hz.

            Does aluminum foil block electromagnetic fields (EMF)?

            Aluminum, the material that tin foil is made of, does conduct RF (Radio Frequency) and as a result, can block wireless EMF. Its effectiveness depends upon how strong the EMF source is and how much foil is used. Effectiveness spans from “reasonably good” to “not so good” depending on those variations. Foil does not block ELF (Extremely Low Frequency).