1. Large storage: The key safe with an external number code is spacious enough (internal dimensions approximately 4.5 x 3.6 x 2 inches) to hold house keys, office keys, or other large car keys. It can also store small items like credit cards or ID cards. 2. Dual unlock modes: This key box features a 4digit combination code and an emergency key. With up to 10,000 possible combinations, you can set and regularly change your access code for enhanced security, making it difficult to crack. The emergency key provides added convenience if you forget the code. 3. Solid construction: Our outdoor key safe is made of durable, robust aluminum alloy, offering waterproof, corrosionresistant, and weatherproof properties, making it ideal for outdoor use. 4. Easy installation: This car key safe includes 4 screws and 4 nylon expansion wall anchors, allowing secure mounting on any solid surface. No extra effort or additional drilling is required to fix the box to the wall.