1. Wireless CPU to display communications, there are
not any wire between the main board and the display.
2. Digital LED showing obstacle distance
3. Alarm by Bi-Bi sound
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. All kinds of sensor colors and styles are available
8. High quality and easy to install