Mission Darkness™ Faraday Bag for Keyfobs (2-Pack)

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  • $ 14.99
  • Regular price $ 16

The #1 Trusted Security Measure for Preventing Keyfob Signal Amplification

SKU: MDFB-K — Now Available as a 2-Pack!

Malicious vehicle entry using keyfob signal boosting methods is the leading threat in the automotive community. Criminals are using signal amplification devices to boost or mimic a keyfob's signal to gain access to automobiles without any forceful entry. The Mission Darkness™ Keyfob Shield is a high quality faraday bag designed to keep vehicles secure by blocking the fob's signal from communicating with the vehicle. It's built with a durable and water-resistant ballistic nylon outer material, and the interior includes three layers of high-shielding TitanRF™ Faraday Fabric on all sides with dual paired seam construction.

The faraday bag works by shielding "always-on" keyfobs and other small electronics (like Apple Watch, transmitters, and credit cards) from radio frequency signals, ensuring that the device cannot get hacked and the signal it constantly emits cannot be boosted. The bag should be used as a preventative measure for vehicle and data security. The bag also allows you to keep a spare keyfob isolated and locked inside your vehicle. The advanced signal blocking bag is commonly used for vehicle security, forensics, military, executive travel, data privacy, and personal security. The capacity is large enough to fit two fobs, or an average set of keys with accessories. The keyfob should remain inside of the faraday bag at all times (when not in use) to ensure your vehicle security.

See How to Prevent Signal Relay Hacking

mission darkness key shield faraday bag blocks rf signals prevent vehicle theft fab signal amplification


  • NEWLY IMPROVED 2-PACK VERSION - Gen 2 version includes two faraday bags in each set!
  • Faraday bag designed for vehicle security and data protection of small devices; also used to block RF signals for forensics, military, executive travel, personal security, and EMP protection
  • Prevents relay hacking and digital car theft
  • Keyfob size bag can accommodate two fobs, or single fob plus keyring accessories
  • Three layers of high-shielding TitanRF Faraday Fabric on all interior sides with dual paired seam construction (TitanRF Faraday Fabric is lab tested and certified to shielding effectiveness standards MIL STD 188-125 and IEEE 299-2006)
  • Water-resistant ballistic nylon outer materials
  • Blocks WiFi (2.4 and 5GHz), Bluetooth, cell signals including 5G networks, GPS, RFID, NFC, and radio signals with 90dB average attenuation from low MHz to 40GHz
  • EMI, EMR, and EMF radiation shielding
  • Belt loop on back side for hands-free access
  • Keyring loop to attach a keyring or carabiner
  • Unique serial number on every bag
  • Easy to access "fold and tuck" closure style

Commonly Used to Shield

  • Keyfobs
  • Building access cards
  • Credit cards
  • Small phones
  • Smart watches
  • Transmitters
  • WiFi cards
  • Thumb drives


  • External dimensions when closed: 5" x 3.25" x 0.25"
  • Internal usable dimensions: 4.5" x 3"

Simple to Use

Simply place fob or device completely inside the bag, fold the top over and tuck under elastic band for instant signal isolation. Device signals cannot penetrate the bag while properly enclosed inside.

Blog Post

Read the blog post about mysterious car thefts across the world, and how to get protected with the Mission Darkness Keyfob Faraday Bag.

Mission Darkness keyfob faraday bag signal blocking anti-hacking key sleeve prevent relay hacking car theft

Customer Reviews
4.7 Based on 19 Reviews
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Bruce C.
Faraday Bag for Keyfobs

Absolute necessity if you have a luxury car to prevent theft. I'd recommend buying an extra for the spare key you keep at home.

United States United States
MOS Faraday Key FOB

I was actually a little indecisive about making a purchase on a Faraday FOB bag. I tossed the FOB into the faraday bag and went shopping for the day. As soon as I returned to my vehicle; I took the FOB out of the bag to open the vehicle. When I was inside my vehicle, I tossed the FOB back into the faraday bag. I tried to start my vehicle and it said "NO ACCESS." So, basically I couldn't start my Raptor. I purchased a ring at the local hardware store, so I can detach the FOB from my other keys. Honestly, even just putting the FOB into the bag and having the other keys hanging outside of the faraday bag worked as well. But, make sure you have both flaps closed. A++ I LOVE IT! Thank you, MOS Equipment!!!! Excellent product!

Great For Crypto Hardware Wallets

I help friends and family with their crypto dabblings – whenever I set them up with a hardware wallet, I make sure to include a Mission Darkness faraday bag. It's a safe and secure case to hold their assets while at the same time providing a bit of insurance from the prophesized EMP, haha. I bounce between this model and the new water proof version – both are excellent, and water proof is even better. I've used a variety of Mission Darkness faraday bags over the years – for cell phones and computers. They work as advertised and block all signals. I think this is something we'll all be thinking a lot more about in coming years.

These really work

These work as described. It is just inconvenient to use them at times. If away and leaving your car in a lot for the day, it's fine. For regular, everyday use, however, it's difficult to have to constantly remove your key fob from the pouch to operate the car doors.

Troy P.
Works great

I have an aftermarket alarm and remote start on my car but my car still requires the factory key fob as it is keyless entry and push button start. This means that my car can still be broken into if thieves use a signal repeater. I therefore keep the fob in the faraday pouch when I’m not in the car and this blocks the signal. I know it works because I have forgotten to take it out of the pouch when trying to start my car and it won’t work.