On June 28th, 2004, 10, Apple released the special edition of iPod U2. The black front panel is equipped with a red click wheel (the color of U2' s latest album How to Dismantle an Atomic Bomb), and the silver chrome-plated shell behind it is engraved with the signatures of four members of the famous Irish rock band U2. In addition, the special edition of iPod U2 completely copied the 20GB model of the fourth generation iPod. This iPod contains coupons from the iTunes Music Store, and you can buy a "digital package" containing 400 U2 songs at a discount-Complete U2.

IPod U2 was upgraded to a color screen on June 28th, 2005. [7]

Software:

Among them, the user interface (UI) design is more beautiful than the third generation nano, and its practicability has been enhanced a lot. The old nano is difficult to operate. In nano 4, the new menu accounts for more than half of the whole screen, and the menu at a glance can make the operation much easier. In the video below, we can see that turning the menu is as fast as changing the cover.