Product Features: The system starts working automatically when the vehicle is put into reverse gear. Sound warning with adjustable position (Off/Low/High) Back protection with 4 sensors (22mm) 0.01% margin of error with sensitive sensors It automatically starts to work when the vehicle is put into reverse gear and detects rear objects thanks to the sensors Superior performance in rainy and dark weather It has the feature of regular operation even in different weather temperatures. SensorsCan be painted grey. It is waterproof. Sound Output It produces sound through the buzzer. Detection Distance: 2 meters. When it approaches the object, it is activated and sounds "beep". 90 cm. In the 2nd stage, the sound accelerates and "beep-beep". 30 cm. In the 3rd stage, it starts beeping directly. "biiippp" Package Contents: Installation cable, computer, sensors and punch for punching the bumper.