17500Hz & 20000Hz Ultrasonic Extreme Mouse Rat Repellent (11 1/2 Hours) Wall Penetration Extreme Version This the extreme version with both 17500Hz and 20000Hz to really annoy or scare the mice or rats. Please use caution when you play this version. Young people with good hearing may be able to hear this. Turn the volume all the way up and let this scare the mice out of your house. You will need good loud speakers for this to work, using your portable devices may work, but not as effective because of the small, weak speakers. To get the best quality sound you will want to run this at the highest quality (1080p) and have a fast internet connection. The quality of the noise is dependent on the quality of you stream.
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