text: I am very disappointed with this product after using it for about a week. It did NOT control my dogs barking at all, instead, it made her much louder. The dogs around her were more concerned about where that noise came from. I would rethink this purchase if you have a multiple dog household. The noise is just a simple beep, but is loud enough for a human to hear. I was so excited to receive this item after reading the reviews, but to my disappointment, it didn't work at all for my dog. This purchase should be made for a dog that would be terrified of a beep or slight vibration, it is not meant for a dog that would pay no attention to a beep or vibration.