... arbitrarily choose:FB: 1, buttons on a curve2, under a key FF3, a folder button FOL +4, a folder button FOL ... , buttons on -7 and the + 10: add 10 buttons, the second is the first, according to the + 10 key jumped into 128 buttons, PAUSE ... folders),11, buttons DEV_CHG: USB/SD card conversion12, REPEAT key REPEAT looping key: according to REPEAT the first broadcast USB or SD ...