Wall Key Box (Black) Large Safe Storage:: The capacity of the large password key box is large enough (internal dimensions are about 80 x 45 x 70 mm) to hold house, office or other large car keys; if needed, you can also store some small things such as credit cards, ID cards, etc. Two Unlock Modes:: This password key safe has a 4-digit code and an emergency key; it allows up to 10000 combinations to be defined. You can set your own password and change it regularly for increased security, which makes it difficult to crack. The emergency key will be more practical if you forget the password! Easy to Install:: This outdoor key safe comes with 4 screws and 4 nylon expansion wall anchors to ensure that the password key box can be mounted on any solid surface. No fuss or extra money to drill a box in the wall. Sturdy Construction:: Our wall key box is made of solid aluminum alloy, which is waterproof, corrosion-resistant and weather-resistant. Perfect for exterior installation. Wide Application:: This large outdoor key box can be widely used in home, garden, office, etc. It is a good helper for any occasion. It allows you to keep and protect your car keys while surfing without having to risk hiding them under sand/rocks, etc.