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A parking sensor is a device that supports the parking and reversing of the car. It works on the principle of sonar - it emits ultrasonic waves, which, after reflecting off an obstacle, allow you to determine the distance between the car and the obstacle. When reversing, the device correctly recognizes obstacles in the vehicle's path and warns the driver with an audible signal. The new sensors are installed on the inside of the bumper and do not protrude beyond its contours. Due to their small size, they look very attractive. Sensors can be painted. It is recommended to apply no more than two thin, even layers of varnish. The buzzer can operate in 3 sound modes: high, low and completely muted. Changing the mode with a switch on the body. The package includes: 4 detectors (sensors) black internal 16.5 mm horn - emitting sound signals distribution board hole saw for drilling holes in the bumper assembly manual Full specification: Operating range/sensitivity 0-2.5 m Power supply 12V Operating frequency 40KHz Operating temperature - 30°C - +70°C Fixing diameter 16.5mm