Features 1) Auto-reverse detection 2) Dual-side LED indicator, showing both left and right sides 3) Three-color seven-stage LED indicator reminding barrier step by step 4) Installation on bumper, just as original fitting 5) Digital LED indicator, right side or left side is shown 6) Ultrasonic sensors, accurately detecting, 4/6/8 sensors are available 7) Different colors of sensor are available to match the car body perfect 7) Full-weather design, un-affected by wind, ice, snow and rain Technical specifications 1) Operate voltage 10-15V 2) Detecting range 2.0m - 0.2m 3) Max. power consumption 4W (max.) 4) Operating temperature -40 - +80°C 5) Alarming volume of external siren 80dB 6) Alarming volume of built-in siren 80dB Packing 20 sets/ctn Carton dimension 42 x 41 x 52cm