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Title: Fullfills the purpose for which I bought it.
Review: I bought it because it has selectable sound ranges. To be honest I was searching for a low priced alternative to the very expensive "Mosquito" anti-loitering device. I bought it to discourage teenage loiterers. None of the settings is actually inaudible to me - I'm 62 - as the "Youth" setting is on the Mosquito. However teenagers seem to find the middle setting quite annoying and usually leave after about 10 minutes. I think it is a bargain considering the purpose built "Mosquito" retails at around $1100.00!
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