My Prime truck had one of these
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mounted to the center of the windshield. It looks like this installed:
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I used it a couple of times to bluff my way out of being blamed for stuff I didn't do.
It's just a lane departure sensor with an annoying electronic "rumble strip" and it was inop in my truck, but it came in handy when a guy tried to say I ran him off the road and another time when a cop tried to say I was tailgating. I pointed at it and asked if they'd like to see the video for themselves.