Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Horrible

I bought this item and had to return it because it wasn't "working". After I got a replacement from Amazon I realized that its working but its just junk. The device is supposed to be able to reach 12' as the largest range. I set the range to 12 and use the plastic checker that they send you to see if it covers the area you require. The lights do not light up until I was 2' away. Even then my dog walked right over and I could hear the beeping but he could care less so the shock isn't enough to deter.