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 key safe has a 4-digit numeric code and emergency key; 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. Emergency keys 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 box key code can be mounted on any solid surface. No fuss or need for extra work to have a box drilled into the wall at much more expense. Solid Construction: Our wall mounted key box is made from a strong aluminum alloy that is weather resistant. water, corrosion and bad weather. Perfect for outdoor mounted. Wide