MULTIFUNCTIONAL USEAGE Premium PU material & strong locks & fully wrapped insulation perfectly ensures that the RFID car key bag blocks 100% of all signals. The multi-function of this Faraday bag can shield, including but not limited to Bluetooth signal, WiFi signal, wireless remote control signal, etc. DOUBLE MILITARY-GRADE FARADY FABRICS The inner layer is made of extra wooden material and double military-grade RF shielding cloth, the fully wrapped design offers stronger signal isolation. HIGH-QUALITY PU LEATHER The outer layer of this car key safe box is made of high-quality PU leather, which is durable and stylish. Perfect size Through testing different models of car keys, todoxi bag finally determines the size of 6.3 * 2.83 inches, ensuring that it can adapt to most car keys in the smallest size, so as to facilitate carrying them with you every day.Practicable, User-friendly and Reliable. SIGNAL BLOCKER BOX FOR CAR KEYS Over 100,000 cars were stolen every year in Britain. Todoxi car key safe box works like a traditional signal blocking bag, which can prevent thieves from using key fob skimming tools to copy or mimic your keyfob's unique signal/wireless code to gain access to your vehicle or keyless entry system. But our signal blocking case has STRONGER shielding function, which can 100% block all signals to protect your vehicle