1.mp3 music player,mini mp3 player 2. compatible with all notebook,laptop,computer 3.USB speaker... 4.Use:Portable Audio mp3 music player,mini mp3 playerModel number ... the computer,PDA, the handset,MP4,the U plate,the SD card and soon… 2.Small size,travel,sports,recreation.3 ... contact us by e-mail or MSN for the inquiry. MP3 music player,mini mp3 player