Standalone Digital Video Recorder,H.264 Compression Dynamic IP and DDNS 3G support,E- ... Total )Video Input 4 channel, BNC , 1.0V p-p/75ΩComposite Video Output1 channel, BNC, 1.0V p-p/75ΩMonitor Video Output1 channel, BNC ... Voltage,Open or ClosedAlarm Output1 Channel, Trigger closed without Voltage,Open or ClosedAlarm ModeSensor Input, Motion Detection, Video Loss, Full Disk Space ...