RFID KEY FOB PROTECTION ] These faraday bags can protect your car effectively. Faraday bags protect your belongings from EMF, RFID and other hacking signals! Effectively stops your keyless remotes from being accessed remotely. You don't have to worry about thieves amplifying your remote signal and opening your car anymore. [ COMPACT SIZE ] Faraday bag size 3.15 x 4.5 inches/8 x 11.5 cm. Smaller than others, more convenient to carry in most pants pockets. Each faraday bag for key fob is carefully tested before delivery and all of them work properly. Includes 2 small faraday bags that you can protect your spare key fob or multiple vehicles in your household. Includes 2 small faraday bags that you can protect your spare key fob or multiple vehicles in your household. [BLOCK ALL SIGNAL TYPES] The Faraday bag is made of premium carbon fiber material and military grade double RF shielding fabric, waterproof which can block WiFi (2.4 and 5 GHz), Bluetooth, GPS, RFID, car key signal, etc. By simply placing your key in the closed faraday bag, you prevent your car key signal from being available to thieves. Protect your car at all times. Block and unlock in just 2 seconds! [UPGRADE DESIGN] The Faraday bag with upgraded zinc alloy hook and key ring. More strong and more portable. You can use the hook to hang on your pants or backpack, the inner key ring ensures that it is easier to take out the car key. All materials have been rigorously tested, ensuring that the faraday bag works great even after long time use. Reliable, high quality, handmade. [ LIFETIME GUARANTEE ] If there is any problem with the faraday bag at any time, please contact us for refund or send a new set, Satisfaction Guarantee Risk-free shopping! Please check the model and size before purchasing.