Quote:
Independent testing carried out by the Department of Zoology at the University of Melbourne concluded that "The promotional literature proclaiming the scientifically proven efficacy of this ultrasonic deterrence device, the Shu Roo, grossly exaggerates its capabilities." and that "The Shu Roo does not alter the behaviour of either eastern grey kangaroos or red kangaroos. The Shu Roo makes no difference to the number of kangaroos hit when fitted to vehicles.".[1]
And the full study if you want a read: