... IR AUX mp3 4.For all 2.0 speaker audio 5.Oem odm USB SD FM IR AUX ... The module specially focuses on the marketing requirements for audio coder, putting the playing function for USB and SD ... and much more convenient to use.(1)Support mp3 Audio playback(2)Integrated USB2.0 full-speed host controller ... remote receiving window, but most of condition for remote receiver. 4,USB power input 5,Power switch 6,USB ...