In 1 set of products, you can also choose any color, such as: 8 sensor products, you can choose black 2, white 3, red 3 You can also paint the sensor, and if so, I suggest you choose a white sensor, so that you can better change the color. When reversing the car , it will start the rear 4 sensors and the front left and right 2 sensors, a total of 6 sensors to assist driving When driving the vehicle to 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 Features: 1The front sensors,detection range can be accurate to 0.3m ~ 0.8m. 2The rear sensors, detection range can be accurate to 0.3 ~ 2.2m. 3Digital LCD display (number light). Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle 4There are two numbers on the display, representing the distance between obstacles in front of and behind the vehicle 5Four alarm sounds can be switched (mute, buzzer, human voice, voice + buzzer) 6The size of the alarm sound can be adjusted. Specifications: Rate voltage: 12V DC Rate operating range: 10.5V - 16V DC Rate current: 100mA - 300mA Ultrasonic frequency: 40KHz Control moudle working temperature: -30 - 80 celcius degree Display working temperature: -20 - 70 celcius degree Sensor diameter: 22mm Installation mode: Drilling Sound: Heart beat type, more recent alarm more rapidly In the parking sensor , we are very professional, we have a lot of different colors of sensors for you to choose, when submitting the order, please give us a color information you need. if your car color is special, please give us a picture of it, let us do better for you. when we contact you, but didn't receive your feedback, we will send to you white sensor. Thank you for buying our products! IMPORTANT NOTES: This device has been designed as a driver aid and must not be considered infallible. Always manoeuvre vehicles with caution and using common sense. Manoeuvre your car slowly in the interest of your own safety and that of others. Always stop the vehicle when the hazard warning is activated, in order to take in account movement inertia. Periodically perform function checks on the sensors and ensure that they are clean at all times. In the event of rain, snow or ice, the sensors may be subject to a temporary drop in sensitivity of approximately 20%. Drive with even grater caution until evaporation is complete. Notes: Product size measurement will have an error, please refer to the physical object.the pictures may not show the actual color of the item. Thanks for your understanding.