The rats were finally driven out.

I live in a house that has two floors and we had rats running through our ceilings and walls. My downstairs neighbors wanted to use poison or traps and I asked them not to since I couldn't see myself using something like that on an animal even though they were rats. I bought the Pest Repeller Ultimate AT not really thinking it would work. After two weeks I kept hearing them and thought the product wasn't working. But then three weeks to the day of plugging in the two units, everything was quiet. The rats were finally driven out. We were very excited that we found a product that worked where you didn't have to torture (too much) the rats or kill them and then have to deal with the mess afterward. What a relief! It's one of those products that people are wary of actually working but to our surprise it did. Thank you.