... ,built-in Lin-ion 4.USB cable Features: This speaker ipod can link to MP3, MP4, Notebook, CD, DVD, ... Mobile phone,IPOD,iPhone&iPhone 3G&4 can be charged when playing by ... SD/USB/SMM card, Auto play function2)with Aux-in connection, support: MP3/MP4, computer, music mobile & iPod, etc3)Stereo sound ... Lithium rechargeable battery & USB power supply (5V, DC) speaker ipod