... and charged D.battery or power source E.OEM 1.portable SD card speaker,mp3 speakers,computer speakers2.Connect to your MP3 ... , computer mobile phone 3. mobile and ipod can be charged4.U-disk/SD can broadcast music by plug in straightly, support ... device, such as laptop, mp3,mp4,CD,mobile phone Specifications:*U-disk/SD can broadcast music by plug in straightly, support ...