It is difficult to be categorical as that one has not seen the neighbor's cat to turn around, but it is clear that there 's no new droppings and birds them , return in peace. This is the desired effect. By cons, few stars because no explanation n 'is given to the frequency settings and sensitivity. For the latter, it is easy to test, but for the frequency, no information on the frequency ranges heard by animals away and those that you want to keep.
