* Product details SPECIFICATIONS: 1. LCD Screen, different background light (Green, Orange and Red, which based on obstacle distance)  2. Built in English voice reporting the reversing distance 3. The screen shows you the direct information when you reversing. 4. Three ranges of volume adjustable, eight-leveled rectangle detection displaying the obstacle obviously. 5. Automatically adjust the brightness according to the situation, never dazzle at night. 6. Anti-jamming technology, low error report. 7. 2/4/6/8 sensors are optional.   Technical Details: Working Voltage: 10.5-15.5V Sensor Mounting Height: 0.5-0.7M Detection Range: 0.3-2M Working Temperature: -40℃~+80℃ 2/4/6/8 sensors are optional. Human voice alarm or Bi-bi sound are available