Capacity : 2GB
Frequency response: 20Hz to 20,000Hz; Audio formats supported: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV
Built-in rechargeable lithium-ion battery; Up to 15 hours of audio playback; Charging via USB to computer system or power adapter.
29 VoiceOver languages
In the Box: iPod shuffle; Apple Earphones; iPod shuffle USB Cable; Quick Start guide