... Face, additionally, as it is a kind of professional access control facial device, it may work with the third party such ... user-defined function keys, the left one is for door belling, the right one is for shift of identification mode. Infra-red optical ... /ACommunication:TCP/IP, RS232/485, USB HostAccess Control Interfaces:for3rd party electric lock, door sensor, alarm, wired bell and exit buttonWiegand ...