Apple has unveiled the new iPod, the fourth generation of the world's number one portable digital music player, featuring Apple's Click Wheel, which combines the smooth and continuous scrolling of a touch-sensitive wheel with five push buttons for superior one-handed navigation. The new iPod also features up to 12 hours battery life and Shuffle Songs, a new command in the main menu.

With over three million iPods sold, the iPod is the most recognisable MP3 player in the world, and appears to appeal to consumers of all ages thanks to its simplicity and the speed of its functionality.

All iPods work with Apple's iTunes software, providing users with a digital jukebox on either a Mac or Windows computer and access to the iTunes Music Store, the largest one digital music service in the world. The new iPod is available immediately in the United States in a 20GB model for US$299 and a 40GB model for US$399.