This makes a lot of sense, actually. It wouldn’t work with tape or CD players because they draw too much power and hand-winding wouldn’t last long. But the demands of a small solid-state-based mp3 player with no screen like the Shuffle are less, so apparently a minute of winding gives you 20 minutes of listening time. Not too bad, but in case you don’t feel like exercise, you can use the USB connector to charge it as well.
As if that wasn’t enough, it’s also got a built-in LED torch and you can use it to charge your cell phone too. Not bad for $80.
Veiro: Winding up your music needs with ease! [Ecofriend.org]