... control 3.FM radio,built-in Lin-ion 4.USB cable Features: This usb multimedia speakers can link to MP3, MP4, ... Notebook, CD, DVD, Mobile phone,IPOD,iPhone&iPhone 3G&4 can ... be charged when playing by plug in straightly. 1)Support SD/USB/SMM card, ... power supply modes: built-in Lithium rechargeable battery & USB power supply (5V, DC ...