[HOOK DESIGN] : Caslord Faraday pouch features a zinc alloy hook on the top to hang on jeans or backpack. Inner key securing chain allows easy access to your vehicle key. [REMOTE KEYLESS ENTRY CAR PROTECTOR] : The Faraday pouch for car keys is made of RFID shielding material that blocks unauthorized signal amplification, helping prevent car theft by stopping keyless entry fobs from being remotely accessed. [MULTIFUNCTION SIGNAL BLOCKING CASE] : Faraday pouch blocks calls, SMS, Wi-Fi, 4G, Bluetooth, RFID, and NFC signals. [ONE SIZE] : 9 x 14 cm. Each signal blocking bag fits one car key. Two pouches included to protect an additional key. [WIDELY USE] : RFID key pouch blocks all signals for any compatible device that fits inside. Compatible with various models and brands. TOTALLY BLOCKS CAR-KEY FOB SIGNAL, HELP PREVENT THEFT How does the Faraday Case work? Some devices can operate over tens of meters, allowing unauthorized individuals to capture device signals without detection. Our Key Signal Blocking Pouch is designed to prevent signal amplification of your key fob, helping protect your vehicle from theft. Keep key fobs and small electronics inside the Faraday bag when not in use to block unauthorized signal access.