Wisdompro RFID Key FOB Protector for Car Key Signal Blocking; WP4694 Faraday Bag for Anti-Hacking, Anti-Theft Pouch – Black

Specially designed and stitched to block RFID signals in the range of 10 MHz – 3 GHz
How to Use: The faraday bag has 2 pockets and only the silver lined pocket can block signals. Please make sure that your key fob is put into the SILVER LINED POCKET and completely close the flap.
Block Car-key FOB Signal – Keep your car’s security system from getting hacked
Size: 5.3″ x 3.9″ – Large enough to hold a car-key fob, a few metal keys, and credit cards, debit cards at the same time
With a small metal ring, it’s convenient and easy to attach