... audio,VGA,network 4.support 2*2T HDD 16 channels H.264 D1 DVR MODEL: ZS-6016HS DVRFEATURES:• Stand-Alone DVR, H.264 Compression • High quality video Display ... from 40G to 3T in Total )Video Input16 channel, BNC , 1.0V p-p/75ΩComposite Video ... Input4 channelAudio Output1 channelAlarm Input2 Channel, Trigger closed without Voltage,Open or ClosedAlarm Output1 Channel, Trigger closed without Voltage, ...