@shootwhatsmyname Two parts, the easier to chew is that Microphones are basically just speakers wired backwards.
The second part is Solar Panels are basically just LEDs wired backwards.
(In both cases there's a lot of design work around them to make them better at one task than the other, but the technology is still the same)
@taladar @Jeraxus It's a Guinness World Record for number of tires per year (ongoing record holder), in volume they don't remotely compete.