... , mobility. This convenience makes security monitoring widely applied to power, maritime affairs, vehicle, oilfield, environmental protection, ... Half D1/D1Video input4 wayVideo interfaceAir connector( could convert to BNC, with 12VDC output)Video frame ratePAL: ... between 16K--2MbpsAudio input4 wayAudio interfaceAir connector( could convert to BNC)Audio codeG.726Audio code rate16KbpsVoice input1 way ...