I have 3 giant breed dogs within no barking ordinance. its seriously difficult to control site hounds even behind 6ft privacy wooden fences. they are large enough to look over the top. I have bought very expensive brands from petsmart and other pet outlet stores. they pulled them off each other in play, played in the pond and destroyed them, plus they never stopped the barking. These work. THe first time I used them stopped it. altho I still have to play with the sensitivity a bit, my one dog shakes her head and the alarm warning goes off. they are also water proof! that has already been experienced. I am thoroughly satisfied with these models. My dogs necks are around 24 inches and these fit well with some room to spare. finally I don't have to chase after them to silence or scold them, these really do work and after first day, just wearing the collar even if its not on seems to remind them to cool the barking. try it!...

Works great, dog isn’t jumping the Fence anymore!

This has been great the vibration is enough to keep my dog from jumping the fence

Our boxer quickly learned to stop jumping the fence. We don’t even have to put the collar on her anymore...it worked really fast.

I used this product on a dog that growled at other dogs through a fence. It worked well to deter that.

This is a great shock collar. My dogs would bark at the neighbors dog through the fence and since they’ve had the shock collar they haven’t gone near the fence! It’s a must have!