4-channel Stand Alone H.264 DVR 2 channel alarm input, 1 channel alarm ... time operating system ItemsSpecificationsVideo SignalPAL (625Line50f/s), NTSC(525Line60f/s)Video Input4 Channel, BNC , 1.0V p-p/75 ohmVideo Output2 ... , Trigger closed without VoltageOpen or ClosedAlarm ModeSensor Input, Motion Detection, Video Loss, Full Disk Space.NetworkEthernet (10/100M )LAN,WAN and ...