1.With FM,USB/SD/AUX-IN/DC input,rechargeable Li-ion battery 2.MP3/computer/laptop speaker, 3.Fasten on the laptop,bike via be Portable mini USB multimedia Speaker with FM receiverPS-753(with LED screen)/PS-752(without LED screen) MP3 speaker introduction:1.with MP3 & WMA double decoder2.Can play the files in MMC card*U disk,MP3 directly*no need conversion*with memory function,and automatic ...