[Bench-Racing]

I believe the mystery box is the control for an older radar detector unit. Check to see if somewhere in the front of your car two clear probes, one on top of the other, sticking out from the bumper area. The top one being slightly larger in diameter then the bottom. This was a top of the line hidden police radar detector in it's day and may still be effective. One dial is on/off & volume, the other dial is sensitivity.