I like the options on the collars and the different levels of sensitivity. The collar also comes with a one warranty which I find nice. The company appears to stand behind their product. I found most other companies do not offer this. I bought two of these collars for my two small dogs because of their unnecessary barking. The collars did their job and now the neighbors are happy.

I cant seem to figure out how to turn the shock off as even level one is too much for my terrier. Otherwise the beeper and vibration work perfect.