... -teaching, Tour-guiding, Micro-meeting, etc. Recording Radio speaker with remote control Description:1.Mainly for Market-promotion, Class-teaching, Tour ... standby time 30 hours.8.Recording Function by other button9.With Remote control, can operate more easily10.Memory play, auto ... the last song played 11.with antenna,auto research easily.12.ECHO Volum control ,make VOICE More clear 13.Support ...