Unfortunately, the Pet Corrector has failed us in every aspect. I had bought it to our dogs wean the unwanted barking degree of the visit is very troublesome. On the success I had not believed from the outset rather, but you're curious! ;-) Well .... tried a few times, always paying attention to the right timing ... but unfortunately, the dogs appear totally unfazed, even worse ... they feel by the sound even goaded and only bark right. (I've also tested individually in each dog, result is the same!)
Maybe that's just in my slobs-pack so .. or the manufacturer should affix the warning: "..funktioniert not at Spitz & Chihuahua" ;-)
The idea was well-intentioned, but can only advise .. Luckily it was not so expensive.