Dar: http://www.youtube.com/watch?v=IpWwhCsDHYI&feature=related Ir filmuotojo atsakymas kaip tai veikia realiame gyvenime: It`s just a parking sensor, not miracle, as the producer tries to tell :-) It really works most of the time of the year. The only weather it doesn`t work is rain, snow and freeze. It that case it beeps all the tones randomly even if car is still. I live in Slovakia (central europe), so 3/4 of the year it`s fine. The best thing and the reason I bought it was there is no need to drill the bumper. If you don`t mind spending about 3 times more comparing to ultrasonic, go for it. :-)