Features:
1) Three digital displays for accurate distance
2) Automatically activated by simply putting the gear in "R"
3) Continuous range to prevent backslide
4) Three alarming modes: digital display, tri-color LED and audible alarm
5) Displays obstacles on both right and left
6) Displays temperature in and out side of the vehicle (optional)

Specifications:
1) Voltage: DC 12V
2) Power consumption: 4W (max)
3) Operating temperature: -40 - 80oC
4) Range: 2m-0.4m
5) Alarm volume: 75dB/55dB/0dB
6) Temperature measurement range: -40 - 60oC