1.Wireless CPU to dispay communications 2.Alarm by Bi-Bi sound 3.Digital LED showing obstacle distance 4.LED display with three colors (Red, yellow & green) 5.Crescent shape digital display screen 6.Turn on/off the voice according to your desire 7.With waterproof connector sensor 8.With 4 front sensors 9.All kinds of sensor colors and styles are available 10.High quality and easy to install