On October 28, 2004, Apple released a black-and-red edition of the fourth-generation iPod called iPod U2 Special Edition. Originally it had a black front with a red click wheel (the colors of U2's latest album, How to Dismantle an Atomic Bomb), and featured the signatures of U2's band members engraved on the back.
On June 28, 2005, at the same time as the announcement of the merger of the iPod and the iPod photo lines, Apple added a color screen and photo capabilities to the iPod U2 Special Edition.
