【100% Block Fob Signal】The car fob signal blocker pouch case stiching with shielded material which stop thieves amplifying your fob signal and opening car, stop your keyless entry fobs from being remotely accessed.And the bag is fit for most of car key, such as:Audi Ford Bmw VW Benz all of Car Van Suvs. | 【2 Layer Design 】Inner layer is anti-radiation,shielding the signal(need to close the lip).you could put the cay key,your phone in it.prevent some thieves amplifying your fob signal and open your car. Out layer is also anti-radiation, but can't block signal.You could insert some ID/Bank card,it can prevent the cards demagetized. | 【 Multifuction 】Blocks calls, SMS, Wi-Fi, 4G, Bluetooth, RFID, NFC - Blocks & Unblocks in just 5 seconds! Discourages phone use while driving - no notifications, no distractions! | 【Easy to use 】 Block the signal of car fob key /credit card /phone in seconds.Palm-sized case easy to put in your pocket, come with waterproof leather surface, easy to clean. | 【Guarantee】We provide perfect purchase service, if you have any problem with the car key Bag, please feel free to contact us.We will give you a satisfactory solution