... Tilt Zoom and Speed Dome Control:more than 60 protocols supported ,preset,scan,auto pan,auto ... controlVideoVideo StandardsPAL625 line,50 f/sNTSC525 line,60 f/sVideo CompressionH.264 main profileVideo RecordingCIF: ... ConpressionG711ABidrectional TalkSupportRecord &PlaybackRecording ModeManual>Alarm>Video Detection>ContinuousPlayback8 channel playback simultaneously,Pause,stop,rewind,fast play,slow ...