Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Neighbors not complaining anymore!!!

These are very effective and safe. *you have to make sure that these are good and snug otherwise the fabric will stretch some and then the contacts won't touch. It only takes a few times of a small zap and they know that they aren't supposed to bark. My dogs houled at night and it echoed through the whole neighborhood. One older neighbor had the guts to let me know that he and others weren't happy. I now have happy neighbors and we all sleep better at night! thanks!