Worked but not for long...

The collars lasted about 4 months. Batteries die pretty quickly, so if you get it, buy back up batteries. Overall, it was effective and I'm thinking about buying another set once we move..... I have 2 pit bulls, they are very active and LOVE to play. One is very vocal (Bones) and the other one is pretty quiet (Diamond). It worked well for Bones but then he figured out how to loosen the collar and would slid it off or he would unclip it somehow (I'm sure Diamond helped him). Then Diamond started picking up Bones' bad habit of barking so I bought her one. And since she is so jumpy it worked for her immediately. However, the collar did not work when Bones was in protect mode. The neighbors dog came up to our fence and Bones barked non stop until the dog left while the collar beeped the entire time. If your dog has a one track mind when he/she is barking, then I don't know if this collar would be good for them.

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