HIGH SECURITY - A 4-digit combination lock with 10,000 combinations is ten times harder to open than a 3-digit combination lock. EASY TO USE - Wall-mounted key box Password original pass: 0000. Easy to use to change the digital code. ROBUST--=zinc alloy key box, weatherproof, frost and rust resistant, resistant to hammering, sawing. WIDE USE - Safe storage of important keys, small valuables such as key cards, credit cards, jewelry etc. color: grey Size: 14*94MM Quantity sold: 1 piece How to change 1 Remove the dust cover 2Aim the word rocker switch button password you set to open 3Close the cover and scramble the code to lock Instructions: 1 After open the box, find the encoding button as shown in the figure 2 Dial the encoding button from position A to B 3 Turn the password dial to set the password you need (It is recommended to set 1000 for the first time to get familiar with the password change method) 4 After you have set the password, turn the knob from B to A position, and the adjustment is completed. About chromatic aberration: The goods sold are all taken in kind, but due to different lighting, monitors, etc., there will be a little color difference, which is a normal phenomenon, not a quality problem About the size: The dimensions of the products sold are all measured manually. Due to different measurement methods and tools, there may be an error of 1-2mm, which is normal