... image.l Build in 1 channel audio input and audio output ports, support realtime audio capture and two-way talking.l ... Horizontal Angle of View60°- 30°Monitor distance15 meters(MAX)Audio Talkback1 channel MIC input,Built-in OR External accessAudio Output1 channel linear ... up to record by motion trigger,alarm trigger, manual, or scheduleAlarm OutputExplorer, Software,E-mailNetwork protocolTCP/IP,UDP,RTP, ...