1.Display the optical image by a camera equipped behind your car 2,Display the distance of the rear obstacle on the 3.5'''''''' LCD monitor. 3.Providing you with a more safe driving circumstance 4,The 3.5'''''''' LCD monitor are clipped on the exist mirror. 5,with a license camera, which installed on the license of the car, it is very easy to install. 6.Alarm by Bi-Bi sound 7.Turn on/off the voice according to your desire 8.All kinds of sensor colors and styles are available 9.High quality and easy to install