Feature:1. Security Door Lock: New technology of virtual password, anti‑tracking and anti‑snooping. After the interior is locked, the outside door can only be opened with a mechanical key.2. High Sensitivity: The semiconductor fingerprint sensor automatically tracks the changes of the user's fingerprint, so as to keep the fingerprint recognition sensitive and effective, and the maximum fingerprint capacity is 100 pieces.3. ID Card Unlock: The magnetic card door can be opened with a touch, which is suitable for the elderly who often forget the password and relatives and friends who live temporarily.4. Louder Doorbell: The built‑in doorbell has a built‑in high‑decibel speaker, which is louder than other smart locks with external speakers. There is also a voice reminder function.5. Free Handle: The handle is free to prevent violent unlocking. Press down and rebound smoothly. Before the recognition is passed, the handle is in a free state. After the recognition is passed, the handle can be unlocked by pressing the handle down.How to Use:1. * key function: one‑key return/cancel/lock;2. # key function: confirm/doorbell/remote unlock request;3. Remote unlock: After the system wakes up, enter 3, # to request remote unlock;4. Lock ID: After the system wakes up, enter 99, # to verify the administrator information;5. Enter the menu: After the system wakes up, enter #, confirm the administrator information,&n