... channel Stand alone DVR with VGA,4-channel, H.264 compressed 2 channel alarm input, 1 channel alarm output Real-time 4-channel Stand alone DVR with VGA,4-channel, H.264 DVR ... , network 7. USB interfaces 8.4 channel playback or single channel playback 9. Support LAN, WAN, ADSL ... ohm, VGA x 1Audio Input2 Channel, RCAAudio Output2 Channel, RCAAlarm Input2 Channel, Trigger closed without VoltageOpen or ...