Mach Speed Trio MP3 Player: * 4GB hard drive * Familiar USB design - Can be used as a traditional thumb drive or MP3 player * Easy file transfer - Drag and drop interface makes copying files easier * Supports MP3 and WMA - Fully licensed by Microsoft for . wma playback and Windows Media Player 10 compatibility * 8 hours of battery life - Take your music on the go with an extended 8 hours of battery life