FUNCTIONS:

1. ON BACKING THE CAR, THE REAR SENSORS DETECT AUTOMATICALLY OBSTACLES BEHIND THE CAR

2. STAGE-BY -STAGE SOUND ALARM, HARSHER SOUND FOR SHORTER DISTANCE TO AVOID COLLIDING

3. DIGITAL DISPLAY OF THE DISTANCE BETWEEN THE CAR AND OBSTACLES FOR PRECISE DISPLAY OF EVERY 1CM MOVEMENT OF THE OBSTACLE.

4. TWO OR FOUR SENSORS FOR DETECTING.

5. DECTECTION RANHG: 1.5M~0.1M BEHIND THE CAR