[High Security Lock Box]-The wall of the key lock box is made of materials. It can protect your key storage box from dust, rust, sunlight, rain and snow, ensuring long-term use. Perfect outdoor wall installation. [Adjustable 4-digit combination lock box] The outdoor key box is a combination of 4 digital adjustable metal wheel locks. It can provide 10000 passwords. You can set and reset your personalized passwords and change them regularly to improve security. [Note] Don't forget the password, otherwise you not be to open the lock box. [Easy to use and install] The combination lock box provides 4 screws, 4 nylon expansion plugs and user manual. Just insert screws and plastic expansion plugs, then drill them into a wall or other hard , and make sure they fit tightly. Clear instructions are easy to follow (including installation kits) and even easy to install, suitable for non-DIYers. [Portable small lock box design] Internal size: 2.7 x 1.1 x 3.25 inches (about 7 x 2.9 x 8.3 cm); very