... ConpressionG711ABidrectional TalkSupportRecord &PlaybackRecording ModeManual>Alarm>Video Detection>ContinuousPlayback8 channel playback simultaneously,Pause,stop,rewind,fast play,slow play ... (10M/100M)PTZ Control1 RS485,1 RS232USB InterfaceUSB 2.0 ports,1 for mouse control,1 for backupSD ... 106kpaDimensionPacking size 511*380*153mmWeight4.5KGMountingDesktop 8 channel DVR motherboard/mainboard