My little dog was the terror of the condo complex I live in - continuously barking and yanking on the leash with everyone to the point where it was a horrible time for all just to have her go out and do her business.....UNTIL I USED THIS COLLAR - I have to admit I did not want to use it but I was getting desperate. The very FIRST time it was put on her - she made one bark and then the collar was activated and then NOTHING - no barks - NOTHING!! All of the neighbors who saw her asked what was wrong with her since that was the first time they had ever seen her quiet - I told them all about the collar. Needless to say, they were amazed as was I!! Now she only needs it every once and a while because she is an angel now!