How does Ç work?Just insert your key.Car at peace In this anti-RFID case that shields signals, it is impossible to unlock and start the car, effectively blocking radio signals in all directions such as RFID/NFC/WiFi/GSM/LTE/GPS/Bluetooth/car remote control etc. MINI SIZE, PORTABLE IN POCKET - Lightweight and compact to hold a single key, this RFID key bag is easy to use.Car is easy to drive.Put it in your bag and take it anywhere in size 12.5 x 8 cm.No more worrying about electronic theft when you sleep at home.at home, staying at a gas station, eating out or paying for groceries at home.checkout! Which type of key is suitable for??For securing radio keys of all common car brands and vehicle types with a keyless entry system.(except Renault cards), also for radio transmitters such as access keys, spare keys.or garage door opener remote controls Unique Keychain Pull Key in 1s - Our RFID blocking case is the only one with a keychain chain.on the market: you just need to reverse the RFID bag and here is the key;attached the chain in your hands.More keys make it difficult to keep the key in your pocket or worry that the key will fall to the ground! Reliable protection with quality!Noticeable - special fabric made of 3 layers in double-woven nanotechnology guarantees safety.Key signal leak-free car;&A grave;This RFID key case is made of carbon fiber material car has a nice quality touch soft, waterproof and tear-resistant.carry.Guaranteed Lifetime Money Back is always available