Overwhelmingly color.
Colorful iPod shuffle - just attach and go. With buttons, VoiceOver and playlists is very hit.
Specifications:
Color: Silver
Memory: 2 GB
Frequency range: 20 to 20,000 Hz
Supported audio formats: AAC (8 to 320 Kb/s) protected AAC (from iTunes Store), MP3 (8 to 320 Kb/s) MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX and AAX +), Apple Lossless, AIFF and WAV
Interface: 3.5 mm jack
Power: Built-in Li-Ion battery Charging via USB from your computer or AC adapter (sold separately)
Endurance: Up to 15 hours of music playback
Dimensions: 29 x 31.6 x 8.7 mm (H x W x D)
Weight: 12.5 grams
Compatibility: Mac/PC with USB 2.0 port Mac OS X v10.6.8 or higher Microsoft Windows XP (SP3)/Vista/7 iTunes 10.7 or later
Contents: Apple Earphones USB cable for iPod shuffle User Guide Quick Setup