Ideally Capacity and Easy Installation: 4 Screws holes at the back of the locked key box,with compatible screws and wall plugs, it can be fixed made of and hard material, this Lock Box hardly deform or break; No need to worry any thief will hammer, saw and pry the combination lock10,000 Combination: the safe code storage box is consist of 4 digits, composed into 10,000 personalized combination; Enable to set the code as you want,and people 't speculate the code Wide Aplication: store car key, access card, house key;convenient for family,friends,relatives or guest's entering if nobody ; Good choice for person who always or on vacationWhere to install: install the key lock box in front of door wall, garage or clothes closet; Suitable for house rental, share house, ,baby sitter, dustman, etc.Size: internal size: 3.1 x 3.74 inch; Outside size: 3.3 x 4.92 inch Material: High quality Aluminum alloy,the secure key hider 't be broken by thieves, strangers, intruders. Color: Black & Silver Compare to the other key box: Extra big: no as same as other padlock or key cabinet with small capacity, the rectangular design enables you to store several door access,cards, car keys, fobs, necklaces, jewellery, ring, etc. Seamless construction: People can hardly see what inside, keep your possession safe. How to reset the passwords? Open the key box, find the reset button (with symbol) Press right the steel tip, and push upward to make the steel tip get stuck into the other slot Rotate 4 digits to set the passwords you want Press downward the steel tip, it will go back to the original place (important process, or you can open the key box any password) And then close the key box, realign the dials to lock the door and conceal your combination. Notice: Please don't forget the password, or you nt to try the 10,000 combination game. Package include: 1 x Key storage locking safe box 4 x Screws 4 x Expansion tubeOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.