can use in PLC and ZigBee two systems, the fingerprint door lock in smart home can fixed with many door. ... safe all.It is controlled product, can use in PLC and ZigBee two systems, accept remote control, telephone control, ... key.Have the normally door set open function, in the door lock back have a small button for ... open; if you want to lock the door, in the door just turn that small button left, the ...