when did the ipod 4th gen come out
List of iPod models In December 2004, Apple unveiled its first limited edition iPods, with either Madonna’s, Tony Hawk’s, or Beck’s signature or No Doubt's band logo engraved on the back for an extra US$50.[8] On 26 October 2004, Apple introduced a special edition of its fourth generation monochrome iPod, designed in the color scheme of the album How to Dismantle an Atomic Bomb by Irish rock band U2. It had a black case with a red click wheel and the back had the engraved signatures of U2's band members. This iPod was updated alongside the iPod Photo and fifth generation iPod.[9]