It's a good product if you live in an area where you ...
I would have given this a five star, however, this is controlled through radio waves. This collar picked up signals that put my dog in agony because it was shocking when no one was near the remote. It's a good product if you live in an area where you don't have cell towers, etc. that picks up radio waves.......as for me, we don't want our dog suffering so we do not use it anymore.
amazon reviews