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