Audio Playback

AAC (16 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, WAV, and AIFF 

Storage

4 GB 

Input      

3.5 mm stereo headphone jack 

PC Connectivity

USB 2.0 

PC Compatibility

• Mac system requirements

          - Mac computer with USB 2.0 port 

          - Mac OS X v10.4.11 or later 

            iTunes 8.1 or later 

          - Broadband internet access 

• Windows system requirements

          - PC with USB 2.0 port 

         - Windows Vista or Windows XP Home or Professional with Service Pack 3 or later 

          - iTunes 8.1 or later 

          - Broadband internet access  

Battery    Built

in rechargeable lithium polymer battery 

Battery Life

Up to 10 hours when fully charged

• Charging via USB to computer system or  power adapter (sold separately)

          - 80% charged in  2 hrs; fully charged  in 3 hrs. 

Dimension (WHD)

0.7 inch (17.5 mm) x 1.8 inches (45.2 mm) x 0.3 inch (7.8 mm) 

Weight

0.38 ounce (10.7 grams)