This animal expeller generates quartz vibrations in approx 40 sec intervals within a frequency range of 400 800 hz 50 hz the tone frequencies and vibrations are intolerable for many soil animals they migrate to other areas within just a few days other useful animals are not harmed the solar animal expeller can be used in the garden in the field or in other outdoor areas with unwanted rodents the finely tuned electronic components and the efficient solar modules guarantee constant functi