Apple iPod shuffle 512 MB White (1st Generation)  (Discontinued by Manufacturer) 512 MB model holds up to 120 songs; supports MP3, MP3 VBR, AAC, Protected AAC (from iTunes Music Store, M4A, M4B, M4P), and WAV Up to 12 hours of battery life, with approximately 4 hour charge time USB 1.1 and 2.0 compatibility through integrated USB connector 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 Intuitive click wheel navigation - with just a thumb, you control Play, Pause, Skip, Repeat & Shuffle