I have a very yappy Pomeranian who thinks every squirrel, leaf, and person walking by the house needs to be barked at. 😅 I honestly wasn't sure this would work, but I was pleasantly surprised. After using it consistently for a few days, she started paying attention to the sound and stopped barking much faster. I love that it doesn't use shock or anything that could hurt her—it just helps redirect her attention. It's easy to use, rechargeable, and the flashlight is a nice extra feature. My Pom still has her moments, but the nonstop barking has improved so much. Definitely one of the best training tools I've bought!