... , motion detection and linkage alarm.Support 1 alarm input, 1 alarm output.Support image blinding and snapshot,etc.Support RS485 PTZ ... ,176*120Audio compressionPCM/MP3Audio port3.5mm audio port,1 input,1 outputCellphone watchsupportDual streamsupportProtocolsTCP/IP,HTTP,DHCP,DNS,DDNS, ... RTP/RTCP,RTSP,PPPoE,FTP,SMTPalarmSwitch ,1 input,1 outputCommunication port1 RJ45 10/100M,1 RS485 ,support ...