Mysterious box

There is a box mounted on the forward headliner inside my 2012 that has the interior lights on it. It obviously has other functions since the corners of the box have what look like lights but are not. What is it? A sensor? The owners manual doesn't show this device.
 
Well it wouldnt be directly related to your dash lights at all. All it does is control speaker volume as it gets louder inside the cabin so you dont have to physically turn it up. If the dash lights are flickering you have a separate issue.