Lorex 8-Channel 1TB HDD DVR with 4 x Day/Night Cameras Surveillance System, Up to 1080p Display Resolution, Up to 130' Night Viewing Distance Operating System: Linux (embedded) Pentaplex: Simultaneous View, Record, Playback, Backup & Remote Monitoring Number of Channels: 8/16 Channel Video IN: 8/16 x 1Vpp, CVBS, 75ohms, BNC Video OUT: 8/16 1 x BNC