... 8/16channel Network CCTV DVR Support 3G and Real time 1/2TB HDD,VGA,USB mouse,remote controller Support smart mobile and network real time ... zoneAudioAudio ConpressionG711A Bidrectional TalkSupport Record &PlaybackRecording ModeManual>Alarm>Video Detection>ContinuousPlayback4 channel playback simultaneously, Pause,stop,rewind ... Input4 channel,BNC,1.0Vp-p,75ΩVideo Output1 channel TV output BNC,1.0Vp- ...