The iPod Shuffle (trademarked, marketed and stylized as iPod shuffle) is a digital audio player designed and marketed by Apple Inc. It is the smallest model in Apple's iPod family, and the first to use flash memory. The first model was announced at the Macworld Conference & Expo on January 11, 2005; the current third generation model, introduced on March 11, 2009, weighs 10.7 grams (0.38 oz).
Released on January 11, 2005, the first generation iPod Shuffle weighed 0.78 ounces (22 g) and was designed to be easily loaded with a selection of songs and to play them in random order. According to Apple, owners of existing iPods had often left the music selection to "shuffle", and the new iPod Shuffle was a way of implementing that in a much more cost-effective fashion. It relies on the use of an "autofill" feature in iTunes, which can select songs at random from a user's music library (or from a specific playlist) and copy as many as will fit into iPod Shuffle's memory. It can hold up to 240 songs (1 GB model, based on Apple's estimate, of four minutes per song and 128 kbit/s AAC encoding). It used the SigmaTel STMP35xx System On a Chip, a flash memory IC, and USB rechargeable Lithium cell.
It lacks a display and the trademark scroll wheel, playlist management features, and is missing the games, address book, calendar, alarm, and notes capability of larger iPods; it cannot be used with iSync. Due to its lower processing power, it is ...