The extension line is mainly applied to the indoor camera model, 3 meters in length, plus the camera itself comes with 1 meter, then the bus length up to 4 meters. (Note: not two 3-meter line and then connected to reach 6 meters Effect, because the line is too long will be too much voltage loss, the camera can not get enough voltage, affecting the normal work or even start can not)<br><br>Power specifications: 5V / 2A: 1.35X3.5 diameter: 1.35, diameter 3.5mm<br><img align="absMiddle" src="https://img.alicdn.com/imgextra/i3/53306014/TB2B83wXVXXXXX6XXXXXXXXXXXX_!!53306014.jpg">