Wisdompro Faraday Bag for Key FOB (2 Pack), WP5696 RFID Key FOB Protector RF Car Signal Blocking Faraday Cage Protector with keyclip, Anti-Theft Pouch, Anti-Hacking Case Blocker – 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. (NOTE: Please place key fob in the SILVER LINED POCKET!)
Size: 5.2″ 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 metal keyclip, it’s convenient and easy to attach