Product Description Additional Information about Apple iPod Fourth Gen. (20 GB, MAC/PC - M9282LL/A ) MP3 Player Product Description Apple iPod 20GB Click Wheel (5,000 songs) Incorporating the fabulous Apple Click Wheel that was first introduced on iPod mini. Offering up to 12 hours of battery life. Weighing in at just 5.6 ounces. And getting slightly thinner with each new generation. iPod continues to define the perfect digital music player for Mac and Windows. Features Supported Digital Audio Standards AAC, AIFF, MP3, MP3 VBR, WAV Additional Features Games, Personal Address Book, Sleep Timer, Voice Recorder Details Size of Display 2 inch Display Features Battery Level, Elapsed Time, Play Mode, Playlist / Table of Contents, Recharging Digital Storage Media 20 GB (Hard Drive) PC Interface Supported Firewire, USB 2.0 Battery Run Time 12 hrs. Battery Type AC/DC Adapter, Internal Battery, Rechargeable via FireWire cable, Rechargeable via USB cable Dimensions (W X D X H) 2.4 in. x .57 in. x 4.1 in. Weight 5.6 oz. MPN M9282LL/A Product Specification/Models MPN M9282LL/A