What is this thing?

I just returned from a local 2 night stay at a state park for our first trip in the T@B.  
Everything went fine, but I noticed something, and I have no clue what it is.  In the clamshell galley, 2016 CS-S, there is a black, round thing between the 120 outlet, and the 12 power outlet. (that is why I put this question in this category) It has what appears to be a lens in it?  Maybe a light detector?  Any ideas?
Pictures are on my phone, will add momentarily.
2016 T@B CS-S
TV 2007 F150

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