Hey if you can get one of the plug-ins, I know for a certainty that they really do work and they also will keep away roaches, and other bugs! I have had my since 2000 and I wouldn't part with it whatsoever. It will cover up to 2500 square foot on a single story. I have a unfinished basement, and the floor is dirt, but I use that for storage primariliary, and there is of course, no opening for the upstairs. If you have a finished basement, it wouldn't hurt to purchase another one for downstairs. I love mine and there has not been one mouse, whatsoever. It will scare away (or whatever it does to them), all animals in the rodent family, and silver fish. Just my observations!!!! Smiles Barbara from WV [email protected]
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