1.  When the reverse gear is engaged, the system will work automatically.
2.  Display unit with built-in 4-stage audible warning buzzer.
3.  Digital LED display to show the distance.
4.  Distance to obstacles is indicated by 3-color (green, orange and red) LED lights in 4-stages.
5.  4 LED lights to indicate left/right obstacle.
6.  Voice indication (optional).
7.  Use imported MICROCHIP CPU from USA.
8.  Detecting Range: 2.0m ~ 0.4m
9.  Working Temperature: -30C~ + 85C
10.  Operating Voltage: 12V ~ 24V
11.  Frequency: 40KHz
12.  Available Models: 2, 4, 6, 8 sensors