Faraday Bag for Key Fob | Phone & Device Signal Blocking

Stop relay attacks on your keyless entry vehicle with our faraday bags for key fobs. These signal-blocking pouches use Faraday cage technology—a conductive enclosure that completely blocks your key fob's wireless signal, making relay theft impossible.

What's in this collection: Compact pouches sized for car key fobs, larger bags for phones and multiple devices, and premium options with additional pockets for cards and cash. Each bag uses military-grade shielding tested to block all wireless signals.

How faraday bags prevent car theft: Thieves use relay devices to amplify your key fob signal from inside your home, unlocking and starting your car remotely. A faraday bag blocks up to 100% of that signal—there's nothing to amplify, so the attack fails completely.

The science behind it: Faraday bags use conductive materials that form a continuous shield, redirecting electromagnetic fields around your key fob. Named after scientist Michael Faraday, this proven technology has protected sensitive electronics for decades.

Verify it works: Test any faraday bag yourself—place your key fob inside, seal it completely, and try to unlock your car while standing next to it. If the car doesn't respond, the bag is working. Our bags are also lab-tested with published dB ratings showing 80+ dB attenuation (99.99% signal blocking).

Understanding your options: Standard pouches offer complete signal blocking in a slim profile. Premium bags add card slots and larger capacity. For EMP protection, look for our reinforced options with additional shielding layers.

Browse our faraday bags to protect your vehicle from relay theft.

Beyond canopies and pads, bedroom accessories include smaller items that complement your sleep protection strategy. Grounding products help you maintain connection to earth's electrical field. Blue light glasses reduce eye strain from evening screen use. These accessories work together to optimize your sleep environment.

We've selected each accessory based on quality, effectiveness, and compatibility with healthy sleep practices. Not every EMF-related product makes our collection—only those that meet our standards for verified performance and practical usefulness in real bedroom environments.

Frequently Asked Questions

Will a faraday bag really prevent relay theft of my car?
Yes. Relay theft requires amplifying your key fob's signal from inside your home. A faraday bag blocks up to 100% of that signal—there's nothing to amplify. Our bags are tested to 80+ dB attenuation. Law enforcement and automotive security experts recommend faraday bags as the most reliable protection against relay attacks.
How do I test if my key fob faraday bag is working?
Stand next to your car with the key fob sealed inside the faraday bag. Press unlock on the bag exterior—your car should not respond. If the car unlocks, the bag isn't sealed properly or has damage. Test periodically, especially after the bag has been used for a while.
Do faraday bags block all signals, or just some?
Quality faraday bags block all wireless signals: cellular, WiFi, Bluetooth, GPS, NFC, and the frequencies used by keyless entry systems. Our bags are tested across frequency ranges to ensure complete blocking. Cheap alternatives may only block some frequencies, leaving your key fob vulnerable.
Is a faraday box better than a faraday bag for key fobs?
Both work if properly constructed. Faraday boxes offer rigid protection and easy access—good for home storage. Faraday bags are portable and flexible—better for carrying in pockets or purses. The shielding effectiveness depends on materials and construction, not the form factor. Check dB ratings to compare.
How long do faraday bags last?
With normal use, quality faraday bags last 3-5 years or longer. The shielding materials are durable, but the closure system and fabric can wear over time. Signs to replace: visible damage, frayed edges, or failed signal blocking tests. We recommend testing your bag every few months to ensure continued protection.