SincereetaliLarge and safe storage: the large combination key box has enough capacity (about 4.5 x 3.7 x 2 inches inside) to hold house keys, office keys or other large car keys; if necessary, you can also store small things, such as credit cards, ID cards, etc. Two Unlocking Modes: This combination key safe features a 4-digit code and a panic button; it can set up to 10,000 combinations. You can set your own password and change it regularly for added security, making it difficult to crack. In case you forget your password, the backup key will be more helpful! EASY TO INSTALL: This outdoor key safe comes with 4 screws and 4 nylon expansion wall anchors to ensure the combination key box can be installed on any solid surface. No hassle or extra work to drill a box into the wall at a higher cost. Sturdy Construction: Our wall mounted key boxes are made of sturdy aluminum alloy that is resistant to water, corrosion, and weather. Ideal for outdoor installation. How to set a password? 1. Open the keystore with the default password (0-0-0-0) 2. Push the reset button on the back of the cover from A to B. 3. Dial the password to the number you want as the new password. 4. Push the reset button to A. Emergency Unlock and Password Recovery: 1. When you forget the password, use the emergency key to open the password box. 2. There are 4 small square holes on the back of the lock. Turn the combination dial to see the red dot from the hole. 3. When the 4 red dots are aligned on the scale, the default password is the one to open the car safe. Note: Please remember to remove the emergency key when you receive this product.