Product LARGE AND SAFE STORAGE: The capacity of the large combination key box is large enough (inner size is about 4.5*3.7*2 inches) to hold house, office or other large car keys; if needed, you can also store Small things such as credit cards, ID cards, etc. Two unlocking modes: This combination key safe has a 4-digit code and panic button; it allows to define up to 10000 combinations. You can set your own password and change it regularly for added security, making it difficult to crack. Emergency keys are more useful if you forget your password Easy Installation: This outdoor key safe comes with 4 screws and 4 nylon expansion wall anchors to ensure that the combination key box can be installed on any sturdy surface. No fuss or extra work to drill a box into the wall at a higher cost. Wide Use: This large outdoor key box can be widely used in home, garden, office, etc. Its a great helper for any occasion. It allows you to keep and protect your car keys while surfing, rather than risk hiding them under sand/rocks etc. How to set a password 1. Open the keystore using the default password (0-0-0-0) 2. Press the reset button on the back of the cover from A to B. 3. Dial the password to any number you want as the new password. 4. Push the reset button to A. Emergency unlocking 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 wheel so that you can 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. Features: Size: 14.7cm * 9.7cm * 5.8cm / 5.8in * 3.8in * 2.3in Inner Size: 11.5cm * 9.2cm * 5cm / 4.5in * 3.6in * 2in Material: Aluminum Alloy Weight: 650g / 1.43lb Packing List: 1 * Security Key Box 4 * Screws 4 * Extension Plug 1* Instructions 1 * Emergency Key