Mice disappear in 3-6 weeks but I have not found them to be effective for mosquitos, but some people have reported them as succe COCKROACH, MICE,INSECT electronic repellerA Very Useful ItemPerfect for :Home Office Garage< Shed Studio HolidayFeatures:Weight: 100gMaterial: ABSItem is small and easily portable Adjustable supersonic frequency conversion. The unit changes frequency 1-60 times each ...