Features:
1) Level-management
2) Dead blot function
3) Terminating: some cards can be deleted or terminated any time
4) Passage: the lock can be set in passage state when necessary
5) Alarm: when the door is not closed properly, the lock gives alarm
6) Memory: entry records can be stored in the lock and be downloaded
7) The information in the lock will not lose when changing batteries
and low battery alarm
8) Key override