*Memory (128M & 256M) *Decodes MPEG 1/2 layer 2/3 audio decoder *Supports the Microsoft?s WMA format file *Supports MP3 players with voice recording and playback function *USB 1.1 controller compliant with MADC specification *Supports SD/MMC/Card reader/writer function *Digital FM radio function *Support lyrics display when music playing *Volume control on record and playback *Firmware upgradeable *Bass and Treble control; configurable multiple band control *Graphical EQ *Use USB Flash Disk with PC without battery *Single AAA battery *Windows and Macintosh USB Mass Storage Class support