[This Faraday bag can effectively protect your car. Lanpard Faraday bag protects your belongings from EMF, RFID and other hacker signals! Lanpard Faraday bag can effectively protect your personal belongings from EMF, RFID and other hacker signals, and prevent remote access to your keyless key. [Compact size] The Faraday bag measures 8 x 11.5 cm. Smaller than others, it is more convenient to put in most trouser pockets. Each Faraday bag for key rings is strictly tested before delivery and can work correctly. Includes 2 small Faraday boxes, so you can protect spare key rings or multiple vehicles at home. Includes 2 small Faraday cages, so you can protect emergency key rings or multiple vehicles at home. [Lanpard Faraday bag is made of high-quality carbon fiber and military-grade RF shielding fabric, which is waterproof and can block WiFi (2.4 and 5 GHz), Bluetooth, GPS, RFID, car key signals, etc. Just put your key in the closed Faraday bag to prevent thieves from getting your car key signal. Protect your car at all times. It only takes 2 seconds to block and unlock! [The Faraday bag is equipped with a zinc alloy hook and key ring. It is stronger and more portable. The hook can be hung on trousers or backpacks, and the internal key ring makes it easier to take out car keys. All materials have been carefully tested to ensure that the Faraday bag can work perfectly even after long-term use. Reliable, high quality and handmade.