[HOOK DESIGN] : caslord faraday pouch Zinc alloy hook on the top to hang on jeans or backpack, inner key securing chain easy to get in or out your vehicle key. [REMOTE KEYLESS ENTRY CAR PROTECTOR] : The Faraday pouch for car keys is made of RFID shielding material that stops thieves amplifying your fob signal and opening the car, stop your keyless entry fobs from being remotely accessed. [MULTIFUCTION SIGNAL BLOCKING CASE] : Faraday pouch for car keys blocks calls, SMS, Wi-Fi, 4G, Bluetooth, RFID, NFC signal. [ONE SIZE] : 7.8" x 4",each signal blocking bag can accommodate one car key.We provide two pouches so you can protect an additional key in your family. [WIDELY USE] : The RFID key pouches blocking all signals for all devices that can be put in. No need to consider the model and brand. TOTALLY BLOCK CAR-KEY FOB SIGNAL, DON'T GET HACKED How does the Faraday Case Work? Some devices can work over tens of metres, making it easy for a (technical) crook to gain information about your devices without you knowing it. Our Key Signal Blocking Pouches are designed to prevent thieves from amplifying your fob signal and trying to steal your vehicle. Key fobs and small electronics should remain shielded inside the faraday bag when not in use,block thieves from boosting your key signal to your car.