... can be used as professional access control because of duress alarm, fire alarm input and output, door state check etc ... 5. Keypad: Total 16 buttons (6 Function Keys and 1 Access Key) 6. Fingerprint Capacity: 3,000 7. ... IP, RS485, USB, GPRS(optional) 16. Separated Time Attendance & Separated Access Control: Support 17. Access Control: Multiple Unlock Periods, Unlock Combinations, Dismantle Proof Alarm ...