Large & Secure Storage: The capacity of the large code key box is large enough (inner size about 4.5 x 3.7 x 2 inches) to place house, office or other large car keys; And you can also store some small things if needed, such as credit cards, ID cards etc. Two Unlock Modes: This code key safe has a 4-digit numeric code and key lock. 'emergency; It allows to define a maximum of 10000 combinations. You can set your own passcode and change it regularly to improve security, which makes it difficult to crack. The emergency keys can be more convenient 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 the key box is coded. can be mounted on any solid surface. No fuss or extra work needed to have a box drilled into the wall at much more expense. Solid Construction: Our wall mounted key box is made from a durable, water resistant aluminum alloy , corrosion and weathering. 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 while surfing, instead of risking hiding it in the sand/under a rock etc.