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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 contour. 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 LED-COB display contains COB LEDs that change color depending on the distance to the obstacle and indicate the systan with an accuracy of tenths of meters. The built-in speaker (buzzer), which warns of obstacles, has 3 volume modes. (high, low, mute) Screen size: 10.5 x 1.5 x 3cm Cable length: ~5m Kit includes: 4 detectors (sensors) black internal 16.5mm LED display with built-in buzzer 4-sensor switchboard hole saw , for drilling holes in the bumper. assembly manual Full specification: Operating range/sensitivity 0-2.5m Power supply 12V Operating frequency 40KHz Operating temperature -30°C - +70°C Mounting diameter 16.5mm