With thanks to Tobias…..
OK, distractions over…. it’s a Ferrari V12 sound simulator made by Soundracer. The sound comes through your car speakers.
How it works:
SoundRacer detects the small signals from the alternator on the 12V system in the car, it does not use ignition pulses. That is why it also works on diesel cars. Manual or automatic transmission makes no differense for SoundRacer, it works on both types but of course the rpm response is different on automatic transmission cars with hydraulic tourqe convertes, the rpm increases as soon as you press the gas pedal.
A built in FM transmitter transfers the sounds on a selectable frequency to the car stereo system.
Cool. And if the Soundracer people are looking in, I’d love to try one 🙂