Wisdompro Faraday Bag, 2 Pack RFID Signal Blocking Bag Shielding Cage Pouch Wallet Case for Cell Phone Privacy Protection and Car Key FOB, Anti-Spying Pouch, Anti-Tracking Case Blocker - Black

Protects chip technology ""smart-cards"" from hackers' RFID readers in the range of 10 MHz - 3 GHz. Convenient and portable - inner silver layer blocks signals, outer Oxford cloth black layer can be used as a normal case - a modern and fashionable design. Block Cell Phone Signal - If you don't want to answer the phone, you can put the phone in the silver layer pocket of the bag and close it, then the phone will be disconnected; this bag can also block Cell Phone GPS Signal to prevent tracking, protect your privacy. Block Car-key FOB Signal - Keep your car's security system from getting hacked. Compatible Size: 7-1/2"" x 3-1/2"" (19 x 8.9 cm) - Fit Car key FOB and Smart Phones