Electronic mouse chasers

A word about the plug in "sonic" mouse chasers that you hear about. My advice is that if you decide to put the money out to experiment with these products then spend the few extra dollars to get the device that allows you to change the frequency every couple of weeks. Mice quickly get used to the noise that is supposed to scare them away and they become useless in a month or two. Being able to switch the frequency will lessen the chance that they will get used to the sound and the device will work better and longer.