Quote:
Originally Posted by Someone
That is a weird one. It almost looks like a central vac inlet, but not quite. Google Image and TinEye searched over 42 billion images with no match. I'm stumped.
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The question was answered in the thread—it's a piezo siren. Check out the second and third photos in
this Walmart listing.
Since BD didn't buy the house, we'll never know what (if anything) would have triggered that siren. I'm guessing either a home security system or a basement flood detector.