This is like a 21st century version of those cassette tapes with 3.5mm jacks; the ones you could use to play CDs from your Sony discman through your car's stereo.
>.> I still use one of those. I drive a 2001 Mustang, so it doesn't even have aux input (let alone Bluetooth). They work great, to be honest.
Huh, In the early 2000s I did support/product for a cassette based MP3 player. A 2001 Mustang would've been right in our wheelhouse!
I replaced the head unit w/ a Pioneer DIN all-in-one. They are cheap, have USB etc. Also frees up the CD player slot for a tray to hold a mobile device and more.
I grew up in the strange time where the cars we got as "hand me downs" had 8-track players. At a yard sale we found an 8-track to cassette adapter, and then put one of those cassette to line input adapters to have a discman playing in these 1970s era cars.