Set of 2 Mini Portable Anti-RFID Car Key Box, Anti-RFID Car Key Fob, RFID Keyless Car Key Shielding Box, Anti-Theft Protection, Anti-Hacker How does it work? Simply place your car key quietly in this anti-rfid protective case to shield the signal, unable to unlock and start the car, effectively blocking radio signals from all directions, such as RFID / NFC / WiFi / GSM / LTE / GPS / Bluetooth / Car Remote Control, etc. Mini Size Portable and Fits in Pocket - Lightweight and compact enough to hold one key, this rfid car key fob easily fits in your pocket, with a size of 11.7 x 7.3 cm, and can be taken with you. No more worrying about electronic theft while sleeping at home, stopping at a gas station, dining at a restaurant, or paying at the checkout! What type of keys is it suitable for? For protecting wireless keys of all common car brands and models with keyless entry systems (except Renault cards), also for wireless transmitters such as access keys, copy keys or door opener remote controls. Garage Door Unique Keychain to Pull Out Keys in 1 Second - Our rfid shielding box is the only box on the market with a keychain: you just need to reverse the rfid pocket and the key will be attached to the chain in your hand. No more struggling to fumble for keys in your pocket or worry about keys falling to the ground! Reliable Protection and Practical Quality - Special 3-layer fabric with double-woven nano technology ensures the safety of car key signals without leakage; this rfid car key box is made of carbon fiber material, with good practical quality of softness, waterproof and wear-resistant. ;