Multi-user mode "free choice of locker"
Every user key can lock an open locker. The user key is then programmed in such way that only it can unlock the locker again. Unlocking the locker clears the door assignment again.
Regular-user mode "fixed locker assignment":
One or (optionally) also several user keys have a fixed assignment to one or (optionally) also several lockers for locking and unlocking.
The use of 2 master keys and 50 user cards is possible for this lock
If the battery voltage drops, an acoustic signal sounds to indicate that a battery change (CR 123) is required.
Emergency opening with master key. If the batteries are completely discharged, emergency opening is only possible by destroying the lock.