IMPORTANT NOTICE: We provide various sensors colors for your choice, in your purchase, please tell us the color to the sensors If you need some special colours for the sensors, please send us the NAME OF YOUR CHOSEN COLOURS while confirming order, then we'll try to select the closest colours for you since we have more than 60 different colours ready. Otherwise you can choose white sensors, and paint them to the matching finish of your car 1:Front Sensor Detection Range:0.98~3.28 ft Rear Sensor Detection Range: 0.98~7.54 ft2:Digital LCD display (number & light). Help to provide increased safety for paengers, pedestrians and family members who happen to be around the moving vehicle Specifications:1:Rate voltage: 12V DC2:Rate current: 100mA - 300mA3:Ultrasonic frequency: 40KHz4:Control moudle working temperature: -30 - 80 celcius degree5:Display working temperature: -20 - 70 celcius degree6:Sensor diameter: 22mm7:Installation mode: DrillingSound: Heart beat type, more recent alarm more rapidl We promise to send the goods within 48 hours 1: When the car is backing up, 6 sensors are activated, four at the rear of the car, anti-collision, and two at the front of the car, anti-scratch angle. 2: When the car is running, brake and activate the four probes in front of the car to prevent theft from scratching and collision. There is a button on the display, through which you can switch between the alarm sound (three types) and the alarm volume (7 levels) The sensor uses a flat double-angle design, which features: high sensitivity, stability, waterproof, dustproof, beautiful, anti-false alarm