• Change password: Enter the correct password and open the cover. Move the L-shaped metal switch up to the right to enter the new password. Reset the switch after entering. • 4-digit numeric codes: Allows up to 10,000 combinations of custom codes. • Easy installation: Includes 3 screws and 2 nylon anchors for fixing on smooth and stable surfaces. • Easy to use: Space for 5 keys and 3 cards. Easy-to-open, close, and adjust combination design. • High-quality materials: Made of high-strength plastic and metal, resistant to sawing, pressure, and leverage.