... function 3.15years lifespan 4.1year warranty 5.CE,FCC,RoHS Mifare hotel door lock with zinc alloy material factory supplier in Guangzhou China ... hotel door lock includeMifare card lock,card,Encoder,software ,and the Energy saving switch. 1.Electronic key door lock ,which install ... the main way to open, and the mechanical keys for possible emergency useWarning function A warning tone will indicate when ...