Works pretty quick
Got a stubborn Kellie, barked barked barked, wouldn't stop. Read the reviews from this site, had a chuckle, bought it, put it on the dog, put it on two, dog barked right through it! Put it on six, barked twice , barked a third time and bang, felt like a bad pet owner, if it was a smaller dog I reckon I'd be picking up tufts of burnt fur, for setting 10 you'd have to own a rabbid grizzly bear I reckon. Back ed it off to setting four and, perfect, dog will bark once and stop, settled her down a lot. Mate this collar is legit!!! Carefully with what setting you put it on, or tufts of burnt fur is what you'll get.