... Channel Standalone DVR H.264 Algorthm, Pentaplex 3.Support Internal CD / DVD-RW 4.USB Backup Standalone DVR AST-DVR0404LN ... 4-Channel Standalone DVR H.264 Algorthm, Pentaplex, Support Internal ... time, video loss, camera lock, motion detection, recordingTV Output AdjustmentAdjust TV output color & display zoneAudioAudio Input4 channel, BNC, 200-2800mV, ...