iPod nano

Apple's iPod nano is the mid-range iPod portable media player. Released on September 7, 2005 and combines features of both the iPod shuffle and iPod classic.
It was intended to replace the iPod mini, which was discontinued on the same day. The replacement of the mini took Apple-related websites and the press completely by surprise since, although there were rumors about a new flash memory-based iPod, there was no prior notice of the popular mini being discontinued.

Development work on the design of the iPod nano started only nine months before its launch date. The nano uses flash memory, like the shuffle, but with a miniaturized version of the color screen and click wheel found on the iPod classic. The screen also has the same resolution as the classic. The surface of the click wheel is slightly textured, and the center button is slightly concave, allowing greater tactile feedback for out-of-sight operation. The battery and other internal parts were also reduced in size from the mini.

Instead of the hard disk used in the iPod classic, the nano uses flash memory. This means there are no moving parts, making the iPod nano immune to skipping.