... , network can be operated at the same time.Specification: ModelGRT-D6004MHGRT-D6008MHOperation SystemEmbedded Linux Operation ... CompressionADPCMRecording ModeManual, Timing, Alarm, Motion detectionSearch ModeBy time, event, channel, logBackup ModeNetwork download, USB ... selectableRemove DetectionEach channel can set independent detection zones and multilevel sensitivityVideo Display1/4 multiple ...