Creative Labs MuVo T100 4GB MP3 Player - Black Box Contents - MuVo T100 player, Earphones, and Quick Start guide Up to 10 hours of continuous playback battery life System Requirements - Microsoft Windows XP (Service Pack 2 or higher), XP 64-bit, Microsoft Windows Vista, and USB 1.1 port (USB 2.0 recommended) Dimensions - Width 2.5 x Height 7.63 x Depth 0.86 Weight - 0.71 ounces