I have electric sonic transmitters in the basement of the house. I bought these decades ago and they are going strong. Haven't seen a mouse since installing them. The first ones I bought turned out to be worthless so I got these from San Francisco. One is installed in the garage and there are extremely few spiders cavorting these days.
Sonic Technologies. Still in CA but not in San Francisco
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I am a retired workaholic and continuing aquaholic
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