iPod (4th generation), Apple Wiki

The 4th-generation iPod, also known as iPod (Click Wheel) and iPod 4G, was an iPod model that was introduced by Apple Computer on July 19, 2004. The model lineup initially featured a monochrome display and later gained the color screen from the iPod photo on June 28, 2005. The lineup was discontinued on October 12, 2005 with the introduction of the 5th-generation iPod with video. iPod (Click Wheel) with monochrome display — July 19, 2004 iPod Photo with color display — October 26, 2004 iPod U2 S

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