"On the ceiling in a hotel. There is a smoke detector in the same room as this. It’s completely smooth on all sides besides the gray thing in the middle"
A: "It’s a PIR sensor. It detects if someone is moving in the room. Usually used for automatic lights or for the alarm."
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Sheila 3 year s ago
Love these! Keep 'em coming!
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Valerie 3 year s ago
#27 why not ask the contractor?
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Winifred 3 year s ago
Valerie, He probably doesn´t speak a word of english
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Marsha 3 year s ago
#9 For all of these lists that I’ve seen, it is the first item I have been able to identify.
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Eben 3 year s ago
Marsha,
I didn't know what these were, but I found a whole bunch of them in my parents' basement and I used them to hold up christmas lights lol
I didn't know what these were, but I found a whole bunch of them in my parents' basement and I used them to hold up christmas lights lol
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Angel 3 year s ago
#40 shows you where my mind is, i though this was some kind of female device for peeing standing up
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Tine 3 year s ago
#15 if it is reflective (often gold on one side and silver on the other) it is likely a light reflector used when taking portraits. It reflects diffused light ("white" or with a golden tone) onto the subject.
I didn't know what these were, but I found a whole bunch of them in my parents' basement and I used them to hold up christmas lights lol