Large & Secure Storage: The capacity of the large code key box is large enough (inner size approximately 10*7*3mm) to place house keys, office keys or other large car keys; And you can also store some small things if necessary, such as credit cards, ID cards etc. Two Unlocking Modes: This code key safe features a 4-digit digital code and emergency button; It allows you to define a maximum of 10,000 combinations. You can set your own passcode and change it regularly to improve security, making it difficult to crack. Emergency keys can be more practical in case you forget the code! Easy to Install: This outdoor key box comes with 4 screws and 4 nylon expansion wall anchors to ensure that the key box can be mounted on any solid surface. No fuss or need for extra work to have a box drilled into the wall at a lot more expense. Solid Construction: Our wall-mounted key box is made of a durable aluminum alloy, resistant to water, corrosion and bad weather. Perfect for outdoor mounted. Wide Application: This large outdoor key box can be widely used in home, garden, office etc. It would be a great help for any occasion. It allows you to keep and secure your car key while surfing, instead of risking hiding it in the sand/under a rock, etc.