IMPORTANT NOTICE: Among the 1 set of products, you can choose different color combinations, such as: 8 sensor products, you can choose Black 2, White 2, Red 2 ... If you need to change, leave us a message when you submit the order. There are 2 numbers on the display, which represents the distance between the car's front and the recent obstacles. Product features: 1>This product adopts double digital display, obstacle distance before and after the automobile,independent display 2>The product uses a buzzer to prompt the alarm, the closer the obstacle is, the faster the alarm.Heart beat type. 3>Display with 7 adjustable volume 4>Can independently display the direction of 8 obstacles 5>Full-weather design, anti-wind, anti-sand, anti-fog, anti-frost, anti-ice, anti-snow, anti-rain sensor systems for enhanced coverage and detection. Product parameters 1>Digital LCD display (number & light). Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle 2>Specifications: 3>Rate voltage: 12V DC 4>Rate operating range: 10.5V - 16V DC 5>Rate current: 100mA - 300mA 6>Ultrasonic frequency: 40KHz 7>Control moudle working temperature: -30 - 80 celcius degree 8>Display working temperature: -20 - 70 celcius degree 9>Sensor diameter: 22mm 10>Installation mode: Drilling when vehicle reversing , it will start the rear 4 sensors and the front left and right 2 sensors, a total of 6 sensors to assist driving when vehicle brake, the four sensors in front of the vehicle will be activated to prevent collision and collision. When you release the brake, the reversing radar will work for about 15 seconds before it stops to help you pass through the obstacle environment smoothly