... 4.USB cable Features: This multimedia portable speaker can link to MP3, MP4, Notebook, CD, DVD, Mobile phone,IPOD,iPhone&iPhone 3G ... function2)with Aux-in connection, support: MP3/MP4, computer, music mobile & iPod, etc3)Stereo sound design, excellent ultra-low sound4)High ... : built-in Lithium rechargeable battery & USB power supply (5V, DC) multimedia portable speaker