【High Security】 and Durability: The key box is made of high strength aluminum alloy, strong enough to withstand violent damage from hammering, sawing or tearing. The protective cover protects the dial from dust, rain, snow or frost, which effectively extends its service life. The combination with the four-digit code offers 10,000 code combinations for improved protection. Don't worry about losing your keys again! Key with code is equipped with a self-luminous numeric keypad; large and clear, so you can enter your code quickly and accurately even in the dark. The light turns on automatically for 15 seconds each time the lid is opened and can be turned on again by pressing the black button. Thanks to this practical night design, it is no longer necessary to use a flashlight to illuminate the dial! Each key box comes with a CR2032 battery. 【Large & Safe Storage: External dimensions (H x W x D): 13.5 x 8 x 7 cm; Internal: 12 x 7 x 5 cm and can hold 7 to 5 cm. 15 keys, 3 to 15 keys 4 car