Features:
1) The system is activated automatically when reverse gear is engaged. It's wireless digital display with built-in buzzer and chirp warning
2) Available sensors quantity: 4 rear sensors
3) Audible distance indication
4) Distance and sound
a) 1.50 - 0.80m: Bi, Bi, Bi
b) 0.80 - 0.40m: BiBiBiBi (the closer, the faster)
c) 0.40 - 0m: Bi... (solid beeping)