... channel16 channelAudioInput4 channel, BNC8 channel, BNC16 channel, BNCOutput1 channel, BNCTwo-way Talk1 channel Input, 1 channel Output, BNCDisplayInterface1 HDMI, 1 VGA ... communication & KeyboardRS4851 port, For PTZ controlGeneralPower SupplyAC100~240V, 50/60HzPower Consumption25W30W40WWorking Environment-10 ~+55°C / 10~90%RH / 86~106kpaDimension(W×D ...