... 2 user-defined function keys, the left one is for door belling, the right one is for shift of identification mode ... .*Professional access control compatible with 3rd party door sensor, alarm, exit button, wired bell and electric lock.*50 time zones, 99 groups ... for: 3rd party electric lock, door sensor, alarm, wired bell and exit button*Wiegand Signal: Wiegand in and out*Power Supply: 12V/3A*Operating ...