RFID Key Fob Protector ==These Faraday Bags can effectively protect your car. Faraday bags protect your belongings from electromagnetic fields, RFID and other hacking signals! Effectively prevent remote access to your keyless entry fobs. No more worry about thieves amplifying your fob signal and opening the car. Blocks All Kinds of Signals == The faraday cage protector is made of premium carbon fiber and military grade RF shielding fabric, waterproof which can block WiFi (2.4 & 5GHz), Bluetooth, GPS, RFID, car key signal, etc. Simply place your key fob in the closed Faraday bag to prevent thieves from picking up and relaying your key signals, protecting you from break-ins and keyless ignition theft. Perfect Size, Fits All Brand Car Keys == Car RFID Signal Blocking Measuring approximately 18cm (7.3in) x9.5cm (3.74in), this handy key fob Faraday pouch is the perfect size to protect your keys, built-in access cards, or other small electronics such as a garage door opener or smart watch.