The Mosquito or Mosquito alarm is an electronic device u... - dofaq.co
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The Mosquito or Mosquito alarm is an electronic device u...

wikipedia - 21 Sep 2015
The Mosquito or Mosquito alarm is an electronic device used to deter loitering by young people by emitting sound at high frequency, in some versions so it can be heard mostly by younger people. The devices have attracted controversy on the basis of human rights and discrimination concerns.

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