... -promotion, Class-teaching, Tour-guiding, Micro-meeting, etc. High quality portable speaker with fm radio Description:1.Mainly for Market-promotion, Class ... the last song played 11.with antenna,auto research easily.12.ECHO Volum control ,make VOICE More clear 13.Support Background ... music when speak. 14.Folder Music play , one key shift.15.One key shift playing mode,shift single,random and all ...