... ,record , playback, network can be operated at the same time.Specifications: Model4 CHANNEL8 CHANNEL Operation SystemEmbedded Linux Operation SystemOperation InterfaceGUI ... .264Audio CompressionG.711ARecording ModeManual, Timing, Alarm, Motion detectionSearch ModeBy time, event, channel, logBackup ModeNetwork download, USB backupVideo Input4ch BNC8ch ... network 8CH HD all-in-one digital video recorder