... ItemsSpecificationsVideo SignalPAL (625Line50f/s), NTSC(525Line60f/s)Video Input4 Channel, BNC , 1.0V p-p/75 ohmVideo ... 75 ohm, VGA x 1Audio Input2 Channel, RCAAudio Output2 Channel, RCAAlarm Input2 Channel, Trigger closed without VoltageOpen or ClosedAlarm ... Output1 Channel, Trigger closed without VoltageOpen or ClosedAlarm ModeSensor Input, Motion Detection, Video Loss, Full Disk ...