1.There are not any wire between the monitor and Main box and camera, it is used 2.4G frequency to transceiver the signal. It is wireless. It is very easy to install.
2.Measuring the distance by radar, the sensors measure the obstacle distance, display in the 3.5" TFT screen.
3.Measure distance between 0.4-2.0M.
4.Direction the way, it can show the obstacle at right or left.
5.With night version camera so that you can see the obstacle even in the night.