... USB SD FM IR AUX mp3 speaker module The module specially focuses on the marketing requirements for ... press to turn up volume. 11,MODE,Mode key, USB flash disks and SD cards transform each ... press for 3 secondsRemote controller function1, MODE,Mode key, USB flash disks and SD cards transform each ... mode), 200+( increase frequency in FM mode);numeric key, combined selection: for example ,if you want ...