【Prevent Car Theft】With your car keys in the box, the signal is 100% blocked, and criminals cannot copy the key signal to open the door and steal the car. You will also get a 【Bonus Faraday Pouch】 to keep your car keys or cards safe when you go out, which is portable and convenient. 【Extra Large Capacity】You can put at least 8-12 car keys at one time. Or put in multiple credit cards and phones. The 5.7x2.9x4.1-inch interior is large enough for you to fit a variety of items that need to be protected from signal. 【High-Quality Leather & Shield Fiber】The exterior is wrapped in high-quality PU leather, exquisite and beautiful, comfortable and durable. The inner layer uses premium double shield fiber, the signal shielding effect is perfect. 【Meet Multiple Needs】When you have a meeting, you can put your mobile phone in the box to avoid harassment and eavesdropping. Credit cards, social security cards, passports, access cards, etc. are safe inside and easy to find when needed. They are a good storage box and signal shielding box.