... player is suitable for promotional gift & outdoor travel..It support Mp3,Mp4,cellphone,FM radio ,easy to apply to ... PC,mobile phone,easy to carry it everywhere.2) We can follow up your requirement ... PORTABLE AMPLIFIER SPEAKERS .==PLAY MUSIC FORM U-DISK,SUPPORT MP3 FORMAT.==APPLY PC,MOBILE PHONE,MP3 AND ... :100HZ~18KHZ Portable speaker,multimedia speaker,small speaker,FM speaker HM-MPR4