Whistle Clickers for Dog Training

The whistle on mine sometimes works and sometimes doesn't, indicating the plastic used to make this wasn't formed correctly, and I have to blow a certain way to get the whistle to make any noise. I got this to get my dog's attention focused, and have found that since the whistle is hit or miss just clapping my hands is a better, and cheaper!, option.

What can I say about the clicker? It clicks.