... preview> H.264 dual-stream video compression> Full channel@960H(960×576/960×480) realtime recording> ... VGA / TV / Spot simultaneous video output> All channel synchronous realtime playback, GRID interface & smart search> 3D ... Output4 channel8 channel16 channelAudioInput4 channel, BNC8 channel, BNC16 channel, BNCOutput1 channel, BNCTwo-way Talk1 channel Input, 1 channel Output, BNCDisplayInterface1 HDMI ...