Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work for dog, caused my roommate considerable pain

The supersonic/regular volume audio tones had no effect what so ever on my Collie/Lab and the supersonic tone was very much audible to my roommate at a certain distance and literally caused him to fall against the wall clutching his head in pain, I don't recommend something this unpredictable to anybody!