The Key Fob JACKET provides ultimate protection against car theft. Car thieves can boost the signal of your fob while near your house, a parking garage, or another parking area. This allows them to get into your car and drive away. Safeguard your key fob from hacking, GPS tracking, RFID scanning, and unwanted Wi-Fi access with this compact and powerful Faraday pouch. The Key Fob JACKET blocks signal from being accessed and boosted, keeping your car protected while not in use. It can also be used for USBs, SSDs, and credit cards. The bag measures 4.75″ x 2.75″ and offers >85 dB attenuation (400 MHz-4 GHz). It is made with black, heavy-duty, water-resistant TPU and a tight, double-fold, magnetic closure to keep your keys safe and dry.