Parking assistance system consisting of 4 ultrasonic sensors for rear bumper, control unit and buzzer with 5 different sound signal levels depending on the distance of the obstacle. It is activated by engaging the reverse gear and works both when the vehicle is stationary and in motion. Equipped with Self-testing function and anti false alarm technology. Fully waterproof quick-connect wiring. TECHNICAL DATA: voltage 12V DC; input & lt; 200 mA; buzzer volume 70 & gt; 90 dB; detection range (rear) 0.2 & gt; 1.5 m; operating temperature -40 ° C & gt; + 80 ° C.