About this product: High security: Our code key box is made of a durable aluminum alloy, resistant to water, corrosion and bad weather. Perfect for outdoor mounted. The protective cover protects the combination dials from unpredictable weather conditions. Large & Storage: The capacity side of the large exterior code key box is large enough (inner size about 11.5*8*4.3CM) 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 key safe has a 4-digit code Numbers and emergency key; It allows you to define a maximum of 9,999 combinations. You can set your own passcode and change it regularly to improve security, making it difficult to crack. The emergency keys can be more practical in case you forget the code! Wide Application: This large Key Box with Code 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 you are surfing, instead of risking hiding it in the sand/under a rock, etc. Easy to Install: This exterior key safe is Comes with 4 screws and 4 nylon expansion wall anchors to ensure the Code Key Box can be mounted to any solid surface. No fuss or need for additional work to have a Box drilled into the wall at much more cost.