@grishka The 30 pin connector had two flavors, one was backed by FireWire and the other was backed by USB. They had the same connector tip but accessories were either one or the other. This one was backed by FireWire, so it works on most iPods and the original iPhone. Later models won’t talk to FireWire-flavored 30 pin devices.
@grishka But the speaker pulls from the wall and charges the iPod
Or technically it can pull from six D batteries which is absolutely true and absurd and only runs for an hour or two.