Up to 5 different user codes can be set from 3-8 digits Any user code can be deleted separately. Single user opening mode or manager code+user code opening model for double security Wrong code input 4 times keypad will be penalty 5minutes 01-59 minutes time delay can be set This Digital keypad lock fits most gun safes ,depository safes ,hotel safes, file cabients and pistol safes PLEASE DO NOT TRY TO INSTALL THIS LOCK IF YOU ARE NOT PROFESSOINAL SAFE TECHNICIAN OR LOCKSMITH. If you have any questions, please don't hesitate to contact us This right-hand opening swingbolt lock features a solenoid-driven bolt operation with zinc alloy construction for durability. Key specifications include: Security Features: - One million possible code combinations - One master code and five user code capacity (3-8 digits each) - Programmable time delay up to 59 minutes (for user codes only) - 5-minute penalty lockout after four incorrect code entries Technical Specifications: - Static current: 10A - Power: One 9V Alkaline battery (not included) - Battery life: Approximately 2 years - Low voltage warning: 4.6V 0.3V - Maximum working humidity: 90% - Bolt type: Swing bolt with solenoid - Actuation time: 5 seconds - Finish: Black Note: Add at least one code before setting other functions. No user codes are pre-programmed from factory. Professional installation by qualified safe technician or locksmith recommended.