... 1,Monitor range:160 square metres 2,Mini sound baby monitor:0.2g,14x4.2mm 3,AV and DC jack pinhole monitor ... china factory, Mini Audio monitor with 160metres monitor range,0.2g,14x4.2mm Features1, Suitable for hidden ... in highway toll station when it is connected with a wireless repeater.6,Cable connection, red-- power supply black-- ground white ...