Lol, we used those little transmitters that you plug into the cigarette lighter plug until several years ago in a mid 2000s car, and they’re still sold and used by people. The funniest thing that happened was when we were overtaking a semi who had one of these, but with a stronger transmitter, so for a couple of seconds we were listening to the guy’s random turbo folk music.
And FYI for any woman out there, these are better for health, as they don’t blast bacteria from back to front. There was a study about it that I read several years ago, which I kept in mind when choosing a bidet. I went for a handheld one, too, and it’s great.