what is this thing on my ceiling?

Old 09-17-19, 08:15 PM
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what is this thing on my ceiling?

My friend recently bought a new home that has all kinds of things built into the house. We find these things on the ceiling in most of the rooms but aren't sure what they are. Does anyone know or have any suggestions?
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Old 09-17-19, 08:26 PM
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Take the cover off and give us a photo of what's inside. It looks like one of these, but I don't know why every room would have one.

Old 09-18-19, 04:05 AM
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I've seen things at my dentist office, only on the walls. It allows electrical cords to be run behind wall and through the wall. Surprised it's allowed. meant for low voltage only.

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