Portable Multimedia FM Radio SD/USB MP3 Sound Speaker - White Color A portable MP3 speaker with FM radio. Also Works as speaker for your MP3 player, mobile phone too 1.Connect the your device such as mobile phone, MP3 player , CD player to the speaker. Connect the USB cable with the player and the PC. (For first time use, please charge the battery for 4 hours). Great gift for all ages, very portable mini music speaker.