Thank you Woofie that is what I wanted to know, we did order one that is battery operated with adjustable ultrasonic sound for different types of animals. The reviews were mixed it seemed those who did some sound adjustment and gave it a period of time to get the settings had better results.
I have not noticed the dogs recently so perhaps they no longer let them run. They keep them confined when they are not home, then leave them out for a run before confining them again perhaps they already heard that folks are not pleased. We want the unit to use as a bit of a deterrent if and when they run around unleashed.
