The USB mp3 is a digital music player that often supports the following:

• MP1, MP2, MP3 and WMA playback
• WMA DRM support on a small number of models
• Ogg Vorbis support on a small number of models (mostly models made after 2005)
• USB Mass Storage device — works with Windows XP, Linux and Mac OS X, acts as USB key drive
• Memory capacities of 64 MB to 32 GB.