Large & Secure Storage: The capacity of the large code key box is large enough (inner size about 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 has a 4-digit numeric code and emergency button; It can set up to 10,000 combinations at most. You can set your own access code and change it regularly to improve security, making it difficult to crack. Emergency buttons can be more convenient in case you forget the code! Easy to Install: This outdoor key safe comes with 4 screws and 4 nylon expansion wall anchors to ensure that the code key box can be mounted on any solid surface. No fuss or extra work required to have a box drilled into the wall at much more expense. Solid Construction: Our wall mounted key box is made of durable aluminum alloy, resistant to water, corrosion and 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 helper for any occasion. It allows you to keep and secure your car key when surfing, instead of risking hiding it in the sand / under a rock, etc.