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You probably don't remember these but I have a question
(lemmy.world)
This is a most excellent place for technology news and articles.
There are also bluetooth adapters that plug directly into those older iPods' accessory port (the slot on the bottom) instead of the headphone jack.
The main benefit of the one I used was being compact, with no wires. The main drawback was having to remove the adapter to charge the iPod. I guess a model with a USB charging cable might exist.