... searching, event searching, recording group searching. - Backup modes:network backup, USB 2.0 backup. - Support RS-485PTZ ... controller operation. - Multiplexoperation: live ,record , playback, network can be operated at the same time. front view: ... multi-channel recording, simultaneous video playback and simultaneous network operation.Audio CompressionG.711ARecording ModeManual, Timing, Alarm, ...