... and playback--Search by time or events(alarm, motion, sensor)--4CH synchronous playback--4ch audio record, ... ,NTSCVideo CompressionH.264Audio CompressionADPCMRecording ModeManual,Timing,Alarm,Motion detectionSearch ModeBy time,event,channel,logBackup ModeNetwork ... 6 levels are selectableMotion DetectionEach channel can set detection zones and sensitivity levelVideo Displaymultiple screen display ...