portable mini car speaker compatible with mp3,mp4,mobile phone and computer This USB speaker is external, has great ... Materials Plastic Product ColorsAny color is acceptedSizes 6 1/4“ x 3" x 2 1/8" Imprint Methodssilk screen Product OptionsPromotional Gifts ... UNION,MONEY GRAM Portable music speaker box for MP3, MP4, Mobile Phone PC computer TF card U disk,audio file