Double-Door Ultra Access Controller Main Board, supports 100000 Users, 10000 Fingerprint, 200000 Cards, 600000 Events, supports 2 Door Control. It can extend up to 62 DS-K2M002X Access Modules, and up to 126 Doors can be controlled. Downstream RS-485 Redundancy Wiring Design to ensure Communication Stability. Web Configuration Management. Wi-Fi, 1× Network, 2× Lock Control, 2× Exit Button, 2× Door Contact Input, 4/4 Alarm IO, 1× Tamper, 7× RS-485, 2× Wiegand (standard 26/34 Input), 1× USB 2.0, 1× Fire Alarm. 12 VDC / PoE.