Ultrasonic Mouse Control

I've been asked about the plug in electronic mouse control products out there and what my opinion was on them. There is an example of the many types in the picture to the left. First off my advice would be that if you are going to invest in these for your home then choose the kind where you can change the frequency. Mice will adapt quickly to the high pitched sound and return again. With the ability to switch the frequency, the mice will not be able to adapt and will stay away. Research these a lot before you buy them and look into their warranty. I've heard both success stories and horror stories on this topic, so buy at your own risk.