KD-MN-02 Portable Mini Music FM SD USB Speaker for PC Mobile Phone MP3/4 Silver No Battery Needed. Charge by USB This mini speaker has compact size and light weight. with FM USB disc,Micro SD card support Music player-allows you to enjoy music anytime anywhere charm. connect your MP3, MP4, CD, Ipod, Iphone, PSP, mobile phones, computers. Metal, circular design, button curved design, a variety of colors, highlights the modern style, make you own way.