[High-End Fashion] The exterior is made of premium carbon fiber textured material and high-quality PU leather, making it exquisite, beautiful, comfortable, and durable. The inner layer uses high-quality double-layered shielding fiber, providing excellent signal shielding. This elegant box can also serve as a desk or home decoration, adding a touch of prestige and elegance. [Note] This model is compact and can only be used to store car keys; it does not support mobile phone storage. [Protect Your Family Car] RFID car key box, holds at least 4-6 keys. The internal dimensions are 3.9 x 2.95 x 1.85 inches, large enough to hold various items that require signal shielding. Its compact design takes up little space, allowing it to be placed anywhere in the home while being easy to carry. [Prevent Car Theft] Having this lock is the first step in protecting your car. Once the car key is inside the box, the signal is blocked, preventing criminals from copying the key signal to open the door and steal the car. (Note: Make sure the lid is completely closed for optimal signal blocking.) [Wide Application - Not Just Keys] You can put your credit cards, social security cards, passports, access cards, and more in one box to protect your family! [Safe and Convenient] Safe to place indoors and easy to find when needed. It is an excellent storage box and signal jammer. This box is designed to block not only car key signals but also signals from contactless credit cards, etc.