The iPod Shuffle, a digital music player, is based on iPod's pioneering and widely used shuffle feature, which randomly selects songs from the user's music library or playlists. It works seamlessly with iTunes and its new AutoFill feature, which automatically selects the perfect number of songs to fill the iPod shuffle from a user's complete music library on their computer. Users can conveniently charge and transfer music from their Mac or PC by plugging the iPod shuffle directly into a USB port. The iPod shuffle doubles as a portable USB flash drive with up to 1GB of storage space to back up personal files and exchange them between computers. The iPod shuffle is smaller and lighter than a pack of gum. The almost seamless PC/ABS shell is robust and very compact. The iPod shuffle comes with its own lanyard so it's ready to wear right out of the box. The controls on the iPod shuffle feel as intuitive and easy to use as those on every iPod model: Play, Pause, Skip, Repeat, Shuffle and Hold are controllable at the touch of a thumb. The circular, ergonomic controls and the one-click slider make it simple to listen without looking. The iPod shuffle is available in two models: 512MB for storing up to 120 songs and 1GB for storing up to 240 songs.