... :352*288Video bit rate adjustable: 32kbps-3mbps,with good video quality and low bandwidthVideo stream channel bandwidth: 200kbps(352* ... BNC1.0VP- P, 75Ω,Bidirectional Voice TalkbackStream type: single video stream or composite streamAudio input:BNC, line/MIC, input ... single track plugMIC available Vbias=3.3v*3/4,inside20dB amplifier,input impedance >3Kohm. single track plugAudio output:BNC, 1channel ...