I can only say SUPER! I have a part now hang for a few months in the carport, because it makes me mad when cats sit on convertible! I have to say, it worked from the first moment! I've also set the frequency No. 7. At first I thought that a device is not the entire surface is covered, but there were - despite 70sqm no problem! I mounted the unit so that it overlooks on bonnet height everything, and by the 90` angle it covers the whole car if you do not just assembled at a distance. First, it beeped even if, before the carport passed, you have to be a little probieten and turn ... have already bought a second for my father ... are both so well satisfied!