1.fits in nearly any space 2. compatible with all notebook,laptop,computer 3.USB speaker... 4.Use:Portable Audio Player portable speaker systemModel number:MA82741.This product is the portable individual motion sound,is suitable in the computer,PDA,the handset,MP4,the U plate,the SD card and soon… 2.Small size,travel,sports,recreation.3.Uses D kind of digital power amplifier chip,low powerloss, ...