Specification sd card sound box: 1.LED display 2.Remote control 3 ... -in Lin-ion 4.USB cable/remote contr Features:This sd card sound box can link to MP3, MP4, Notebook, CD ... in straightly.1)Support SD/USB/SMM card, Auto play function2)with Aux-in connection, support: MP3/MP4, computer, music mobile & iPod, ... -in Lithium rechargeable battery & USB power supply (5V, DC) sd card sound box sd card sound box