... :0.2g,14x4.2mm 3,AV and DC jack pickup china factory, cheap pinhole sound pickup 160metres monitor range,0.2g,14x4.2mm Features1 ... a pinhole. AV and DC jack, which is very convenient to connect. It’s also very good to surveillance. 2, High sensitive pickup ... .It is for monitor and sound recording. Monitor range is up to 160 square meters. 3,High sensitivity, low noise, low distortion ...