... Raid function12.Powerful network software:built-in web server,multi-DVR client &SMS Networking access for remote live viewing,recording ... perimeter detection,items care, flowmeter, abnormal video signal diagnosis17. DVR,NVR and HVR, 3 in 1.18. Support XM ... & Raid(Redundancy)Backup ModeNetwork download/Flash stickInterfaceVideo Input1ch SDI + 4ch BNC1ch SDI + 8ch BNC Video Output2ch BNC output, 1ch VGA ...