The system is a vehicle auxiliary device helps the driver change safely during driving.Detect the side/back of the vehicle with the help of a 24Ghz ultrasonic sensor to move the object to the blind spot of the detection area.The system works in a set of control boxes (controlled by a computer), two ultrasonic sensors, two blind zone monitors (or LED lights), a buzzer and a harness, which is the perfect connection between ultrasound and computer.There is a blind spot at the rear of the vehicle, which is easy to endanger driving safety. When you install the into your cute car, whether it is daytime, night or in the snow, as long as there are moving objects behind the vehicle, you can be in LED lighting. When it is turned on, it will sound an alarm, flash, and the buzzer sound will keep the driver cautious when changing lanes, avoiding the possibility of side collision accidents.When you are to the car, open the door and if someone moves backwards, it will also give an alarm. Voltage : 12VMaximum : 5W (max)Working Temperature : -40 Celsius--- +85 Celsius Temperature : -40 Celsius--- +85 CelsiusWaterproof level :IP67KDetection Range : Lateral Distance : 0. - 4m; Rear side Distance : 0. - 10m.Detection Range Accuracy : N96%Alarm Range : 0.-10mSystem Alarm Accuracy : N96%Alarm : 1 = more than LED light turn on. 2 = more than LED flash and buzzer sound.Colour: blackMaterial: ABSPackage Contents:2 * Microwave sensor2 * LED light1 * Main wire harness with buzzer1 * Extension of sensor cable2 * Extension of LED1 Set * Installation Only the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.