Instruct: Classify Amazon reviews into positive or negative sentiment
Query: bak solver X40

Dont waste your money on this. You can only return it if its unused. Well, how do you know if it works or not if you dont try it. The dogs were a little quieter at first but now they are used to it and they don't notice it at all. I've only hade it one week. It goes off with every sound so the dogs dont relate it to there barking. So Im back to square one. Its realy not my place to train the neighbors dogs. I just want them to STOP BARKING.Big wast of my money!!!!