1. Larger than the normal size of other products, can accommodate multiple door keys, car keys, access cards, and can also be changed to credit cards, ID cards, USB thumb drives, etc. 2. Sturdy material-The key lock box is made of hard aluminum alloy, strong and durable. The password wheel has a protective cover to protect the password wheel from the weather. The TPE protective plate on the back reduces friction with the wall. 3. High security lock box-4 digit combination dial provides 10,000 combinations to realize the of keyless use and safely your keys. The high-quality password wheel slides smoothly, without worrying about stuck and unable to open. 4. Widely used-The combination lock box is designed for indoor and outdoor use. It is an important key storage lockbox for emergency entrances, hotels, , holiday houses, pet caregivers, etc. It has a wall-mounted design and can be installed permanently. External dimensions: 133 x 92 x 49mm Internal size: x 80 x 40mm Material:Aluminum alloy + steel + TPE colour:black Package Contents: 1 x Key code box 1 pack x expansion Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.