[HOOK DESIGN] The pouch features a zinc alloy hook on the top for easy attachment to jeans or backpacks. An inner key securing chain allows convenient access to your vehicle key. [REMOTE KEYLESS ENTRY CAR PROTECTOR] This Faraday pouch is made of RFID shielding material that helps prevent unauthorized signal amplification of your key fob, protecting against remote access to your vehicle. [MULTIFUNCTION SIGNAL BLOCKING CASE] The pouch blocks calls, SMS, Wi-Fi, 4G, Bluetooth, RFID, and NFC signals to help safeguard your key fob from wireless threats. [ONE SIZE] Measuring 9x14 cm, each signal blocking pouch is designed to hold one car key. Two pouches are included to allow protection of an additional key. [WIDELY USE] These RFID pouches block signals for any compatible device that fits inside. No need to consider specific models or brands. TOTALLY BLOCKS CAR-KEY FOB SIGNAL – HELP PREVENT UNAUTHORIZED ACCESS How does the Faraday Case work? Some electronic devices can transmit signals over long distances, potentially allowing unauthorized individuals to intercept data without detection. These Key Signal Blocking Pouches are designed to shield your key fob from signal relay attacks. Keep key fobs and small electronics stored inside the Faraday bag when not in use to help prevent signal boosting attempts.