Features: 1) Detection range: 0.3 - 2.19m behind the car 2) Power voltage: 10V-15V DC 3) Alarm volume: >78dB 4) Consumption: 4 W (at most) 5) Operative temperature: -40 - 80oC 6) The system will automatically detect obstacles behind the car when in reverse gear 7) Accurately senses obstacles via 60 degrees "cone of detection" from each sensor 8) The digit show the obstacle distance accurate to centimeter 9) The buzzer has three different tone levels to warn of object proximity 10) Showing the particular direction with "L","C" or "R" 11) Various sensor colors such as black, grey, blue, red, green, and white are available 12) 2 -8 sensors are available 13) TFT LCD display options 14) Full DIY instruction makes system easy to install