No need for installation: No need for a fixed installation, no need to punch, directly locked on the guardrail, door handle, door handle, very convenient, and set your preferred number as a password. The 4-digit combination is easy to memorize and reset. Hidden Security: The locking housing is a combination of 4 digitally adjustable metal wheel locks. Metal wheels are easy to control and can provide 10,000 combinations. Durable durable: The safe adopts a double layer zinc and heavy steel alloy structure, resists hammering, tingling and sawing, non-toxic materials and steel and the anti-rust shutter door make it resistant to weather. Large storage space: Key storage space holding up to five keys is enough to store your U disk, your car keys. You can put your keys or car keys when you go to work or on vacation. Applicable places: To facilitate access and ensure safety, can be placed in the company, the factory, the class, the entrance of the apartment. Reduce a lot of their own problems, if you encounter problems while using it, please contact us in time to provide you with the fastest and best help! Waterproof and Antirouille < P> In bad weather, to avoid unnecessary damage to the product, our protective cover can be impermeable and anti-rust, which extends the use of the product. Product specification. Color: Gray Lock the size of the body: 85x62x30mm / 3,4x 2,4x1,2inch Lock body material: zinc alloy and thick steel weight: 500g / 1lb No Need to install NOT Need for fixed installation, no need for perforation, directly on the railing, the door handle , the door handle, very convenient, and set your preferred number as a password. The 4-digit combination is easy to memorize and reset. How to open the key box correctly? Unroll the black lid waterproof at the Water and dust, you can see the password wheel and the opening button. Dial password to 0-0-0-0 (factory password) and press the opening button. Open the lid. Once the lid is open, remove the lock bar inside the housing. Insert the locking notch to the right and insert it into the Upper hole of the locking box. At the same time, press the button inside the box to insert it into the unlock 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 define a Password? The Reset button is to set a new password from the most important position for dialing. Bring the password dollet group group Until the desired password. Special advice: Do not turn all dials after setting the code, simply turn one to test. Before mounting the keychast.