Apple 512MB iPod Shuffle includes iTunes for Mac and Windows, white earbud headphones, and lanyard. It is about the size of a pack of bubble gum, the iPod Shuffle gives you 512MB of storage space that can be used for both music and data. The storage is flash-based, which means there's no moving parts, making it a great choice for listening to music during your workout. Transferring your music or data files, is extremely easy and convenient. Requiring no extra cable, you simply pop off the cap on the end of the iPod Shuffle to reveal the built-in USB 2.0 connector. Then you simply plug the iPod Shuffle directly into your computer! While connected, it can also sync with iTunes and recharge the battery! Built-in Battery Indicator Stereo Minijack With iTunes you can set exactly how much of your storage space is used for music and data. With iTunes you can use the Autofill feature, letting iTunes automatically fill your device (depending on how much music space you gave it) with random music Audio Support - (MP3 / MP3 VBR / AAC) 8 to 320 Kbps / Protected AAC (from iTunes Music Store, M4A, M4B, and M4P) / Audible 2, 3, and 4 / WAV Unit Dimensions - 3.3 x 0.98 x 0.33 Unit Weight - 0.78 ounces. Compatible with Mac OS X v10.2.8 or later (Mac OS X 10.3.4 or later recommended for use with low-power USB ports) and Windows 2000 with SP 4 or Windows XP Home or Professional with SP 2.