Installation and test: 1、 After this sensors are installed, it is necessary to adjust the axis and direction to the correct position, then arrange the wire in good order; 2、 To connect the power wire of the control box with the turning light correctly； 3、 To connect the digital display with the control box well; 4、 To put the gear lever to reverse gear, then radix point in the display should be lighted, it indicates that the system is under detecting status; If not, please check it as following steps; 5、 To connect one sensor with corresponding plug in control box, it can be operated normally if someone stands in 1.0m, then check others sensors according to this way. After check, all of sensors would be connected with corresponding plugs.