I am very happy with these collars, I have 3 sisters dogs almost 2 yrs old. They copy each other with barking and some aggression when they see other dogs and become a pack.Easy to understand how to use them. I don't have to use them a lot but when I do the dogs automatically respond to the buzz or vibration and stop doing what they shouldn't be doing .Even if I'm up stairs doing jobs I take the hand control with me and if I can hear them barking at the back gate ,a quick push on the controller and they stop. They don't seem to know where this is coming from, and no not think it's coming from me which is funny. I only have them set on the lowest number 1 and it still works.Jacque...

For fox poo free walks

This is FANTASTIC! Although expensive it has been worth every penny

Great. Had yappy puppy driving me up the wall. Now shes great.

Great training device for my exuberant Lurcher

Works well will use again