... CH SDI inputVideo Output1 CH BNC output(1.0Vp-p/75Ω),1 CH VGA outputPicture AdjustmentBrightness, Contrast ... BNC interface, 1ch headphone outputAlarmAlarm TriggerVideo lost, motion detection, external inputAlarm Port4in/4outPre-recordingSupportFunctionCommunication PortSATA HDD(optional), USB, SD card, 1 RJ45, 1 ... RS232, 1 RS485Support ProtocolsTCP/IP,HTTP,UDP,RTP ...