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Pros:It is well known fact that these types of sensors work using high frequency waves in order to detect movement within a protected area.
Cons: Are you sure that this kind of high frequency waves has no harms to human health? Nobody has ever mentioned this? Or everybody dare to take this side effect?
Bottomline: I am always afraid high tech side effect, sometimes which bring us horrible harm.
(Posted on 8/14/11)
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