I hate when I say things like "oh I want an ipod classic but with bluetooth so I can use wireless headphones" and some peanut comes in and replies with "so a smartphone with spotify?" No. I want a 160GB+ rectangular monstrosity where I can download every version of every song I want to it and it does nothing except play music and I don't need a data connection and don't have to pay a subscription to not have ads and don't have popups suggesting terrible AI playlists all over the menus.
Gimme the clicky wheel and song titles like "My Chemical Romance- The Black Parade- Blood (Bonus Track)- secret track- album rip- high quality"
Tangara is an open source iPod clone, which includes bluetooth: