NO INSTALLATION NEEDED: No need to fixed installation, no need to punch, directly locked on the guardrail, door handle, door handle, very convenient, and set your favorite number as a password. The 4-digit combination is easy to remember and reset. HIDDEN SECURITY: The lock box is a combination of 4 digitally adjustable metal wheel locks. The metal wheels are easy to control and can provide 10,000 combinations. DURABLE DURABLE: The safe adopts zinc alloy and heavy steel double-layer structure, resists hammering, pecking and sawing, non-toxic materials and anti-rust steel and shutter door make it weatherproof. LARGE STORAGE SPACE: Key storage space for up to five keys is enough to store your U disk, car keys. You can put your keys or car keys in it when you go to work or vacation. APPLICABLE PLACES: To facilitate access and ensure safety, can be placed in the enterprise, factory, classroom, apartment entrance. Reduce a lot of their own troubles, if you encounter any problems during use, please contact us in time to provide you with the fastest and best help! Waterproof and rustproof < p>In bad weather, to avoid unnecessary damage to the product, our protective cover can be waterproof and rustproof, which lengthens the use of the product. Product Specification Color: Gray Lock Body Size: 85X62X30mm/3.4X 2.4X1.2inch Lock body material: zinc alloy and heavy gauge steel Weight: 500g/1lb NO NEED TO INSTALL No need fixed installation, no need punching, directly on the railing, door handle , the door handle, very convenient, and set your favorite number as a password. The 4-digit combination is easy to remember and reset. How do I open the key box correctly? Unroll the black weatherproof cover water and dust, you can see the password wheel and the opening button. Dial the password to 0-0-0-0 (factory password) and press the open button. Open the lid. Once the lid is open, remove the locking bar inside the case. Insert the locking notch on the right and insert it into the upper hole of the lock box. At the same time press the button inside the box to insert it into the release switch. (When the lock is removed, also push the button to the right to extract the lock). Close the cover and unlock the password to lock it. How to set a password? The Reset button is to set a new password from the most important position for dialing. Bring the group of password dials to the desired password. Special tip: don't turn all the dials after setting the code, just turn one to test. Before assembling the key safe.