... capacity:2000,Face capacity:4002,Comm Port: TCP/IP,RS232/485, U flash.3.Verification mode:Face,Fingerprint,password ... 4 hours continuous operation.Optional built-in wireless Wi-Fi or GPRS for wireless communicationBuilt-in contacts for 3rd party electric ... 0 & Finger 10.02000mAh backup batteryOptionalCommunicationTCP/IP, USB Host, RS232/485, Wiegand Out, Access ControlInterface for 3rd party Electric ...