This is great and very effective m. In the winter when there are no leaves on my hedges my dog loves to bark at everything that walks past on the other side. This is very annoying not only for me but mainly for my surrounding neighbours.Took only about an hour to charge and simple to set up, easy to change settings.Since receiving no one has mentioned any barking so either the collar works he or sulking so much he doesn't bark either way it seems to be doing the job.