Q: Bark Off?

The Bark Off is a product that I heard about on tv. it is just a remote that is spose to make a humane sound when your dog is barking and you press a button on it. It is not spose to hurt your dog's ears at all. and nothing goes on the collar. So does anyone know if this product is a humane product or does it hurt the dog's ears? Let me know soon cause I want to know if it would be a good idea or a bad idea to get one?