Faraday Bag for Car Keys — RFID Signal-Blocking Key Case

Faraday Bag for Car Keys A slim Oxford-cloth key case with a shielding lining that blocks keyless-entry RF and RFID signals around your fob. Drop your key inside when you're not driving to help prevent relay attacks, where thieves amplify your fob's signal to unlock a keyless-entry car. Details Blocks keyless-entry RF and RFID signals while the fob is sealed inside Durable Oxford-cloth outer, shielding inner layer Size: 17 × 9.5 cm — fits most key fobs, and a phone or cards too Available in black, grey, red, and blue Test it on arrival: seal your fob inside and try to unlock your car from a few feet away — if it doesn't respond, the case is blocking the signal. Explore more: Faraday bags · RFID protection · EMF & RF detectors.