1. Colorful wireless LCD display with buzzer built-in
2. Use RF wireless technology
3. Radar sensor activate when the reverse gear is engaged
4. "BiBi" audible warning buzzer in 3 steps
5. Volume switch control
6. Volume switch control, seven-stage obstruction distance display
7. Direction indicator of left behind, middle left behind, middle right behind and right behind
8. Detachable sensor with waterproof socket connector (optional)
9. Digital meter distance mode, feet display available
10. Detected in back, 2 - 4 sensors available
11. Heavy rain-proof & all weather design
12.High quality and easy to install