FLU I have something similar but I never plug it in… too many things going on in the car.
BTW there were a couple dozen speeding violations in court yesterday and guess what::: not a single one was radar related. There is some course cops take in which they get good at estimating speed. The cops are tested with 100 vehicles driving by and they have to guess the speed. If they guess right a high percentage of times, they get some kind of certification that says they are qualified to estimate speed.
Also, they spoke a lot about the calibration of the speedometer of the police car. Many of the speeders were “paced” by the cop in his car.