Product Description * 40 GB model holds up to 10,000 songs; supports AAC (16 to 320 Kbps), MP3 (32 to 320 Kbps), MP3 VBR, Audible, AIFF, Apple Lossless and WAV * Holds 25,000 photos and displays them on a 2-inch diagonal 65,536-color LCD screen with LED backlight * Up to 15 hours battery life when fully charged (which typically takes 5 hours); fast-charge in as little as 3 hours * Compatible with Mac OS X or Windows 2000 with SP4 and XP; FireWire and USB 2.0 interface for fastest digital transfer available * Comes with iPod photo dock, earbud headphones, a carrying case, an AC adapter, a FireWire cable, a USB 2.0 cable, and an AV cable The Ipod is 40GB and is pretty much new i only used it twice when i realized i don't use it enough!!!!!!!! When you buy this i will give you a free carrying case to take it with you where ever you go!!! Product Feature Supported Digital Audio Standards AAC, AIFF, MP3, MP3 VBR, WAV Additional Features Games, Personal Address Book, Sleep Timer Details Size of Display 2 inch Display Features Battery Level, Elapsed Time, Play Mode, Playlist / Table of Contents, Recharging Digital Storage Media 40 GB (Hard Drive) PC Interface Supported Firewire, USB 2.0 Battery Run Time 15 hrs. Battery Type AC/DC Adapter, Rechargeable via USB cable Dimensions (W X D X H) 2.4 in. x .69 in. x 4.1 in. Weight 6.2 oz. MPN M9585LL/A