iPod (2nd generation), Apple Wiki

The 2nd-generation iPod, also known as the iPod 2G or iPod (Touch Wheel), was released by Apple Computer in August 2002. The new iPod had a few hardware improvements such as a redesigned hold switch, a cover for the FireWire port and slightly more rounded body. The main improvement was replacing the mechanical scroll wheel with a capacitive-sensing Touch Wheel, which would be adopted by subsequent models. It also offered larger hard-drive capacity options, in 10 and 20 GB models that also includ

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