text: Without a way to tell if this was giving any signal to my dogs, I can't really say whether my dogs just aren't responsive to this type of correction or whether it may not have been actually emitting. It appeared to be in working order and was shipped rapidly and packaged well. The lights in it would indicate power and response to the dogs. I can't give it less stars than 3 as it may just be my dogs and not an issue with the product. I also cannot give more than 3 stars as I had no way to verify that the product was emitting a signal to the dogs. I DO absolutely recommend trying it out, as it may work fine for your barking issues. It's worth a try. Return process was painless.