Feature: 1. Multiple Unlocking Methods: Choose from three convenient ways to unlock your door, password, app, or traditional key, ensuring there is always a suitable option for you. 2. Virtual Password: Prevent password leaks and peeping by entering any set of numbers before and after the correct password, effectively combining wrong and real numbers for added security. 3. Auto Locking: Never worry about forgetting to lock the door again with the automatic locking feature. Simply close the door behind you, and the deadbolt will automatically engage for added security. 4. Easy One Button Lock Switch: Convenient for the elderly and children, the one button lock switch allows for quick and easy locking from the inside with a simple press, making it effortless to secure your home. 5. Error Alert Function: Keep your home safe at all times with the error alert feature, triggering an alarm after 5 incorrect password attempts. This feature provides peace of mind whether you are at home or away. 6. Anti Static: No more electric shock feeling in winter with the anti static feature, protecting against electrostatic discharge to ensure a more comfortable experience when opening the door. (Can withstand up to +/‑8KV in contact and +/‑15KV in air) Specification: Item Type: Smart Password Key Door Lock Material: Alloy Key Type: Password and Mechanical Key Password Capacity: 3 management users, 47 ordinary users Power Supply: 4 x AA Batteries (Batteries Not Included) Indication: Light and Buzzer Notification Low Voltage Alarm: ≤4.8V Antistatic: Contact +/-8KV, Air +/-15KV Standby current: