... & smart search Smart video detection: Motion Detection, camera blank, video loss Easy backup: USB devices, DVD-RW, network download Built ... zones for privacy masking for each cameraOSDCamera title, time, video loss, camera lock, motion detection, recordingRecordingVideo/Audio CompressionH. ... DVR with H.264 dual-stream video compression,4 Channel D1 real-time preview ,DVD-RW function, alarm function