I bought it to push a mouse family, I thought it would work given the positive feedback, like what one should not always trust the comments because it did not work at all, it n ' not bother us but the mice with the unpleasant noise produced by the device so when they claim that it is inaudible is a beautiful lie. I left a little more than two months, there has been no result, it was even worse (obviously I had taken poison and fags). So I had to take the old methods to get rid of, which is a shame but no choice. I wanted to buy one in an appliance store, apparently it no longer exists because the waves would have a negative effect on humans and because it is not compatible with electronic devices. In any case, I recommend to everyone to buy what repulsor, because obviously it is useless, it does not even deserve the name given to it! In short, an unnecessary expense ...