1.CE,ROHS,ISO,FCC 2.Rechargeable,li-ion battery inside 3.MP3/USB/SD/MMC input, reverb 4.Radio,song switch 5.MOQ:100pcs AXUE YB-9468This mini speaker is widely used at home, office , school , church , factory , hospital ,meeting , restaurant , army etc .Basic function: your voice could heard loudly by others when you speak via headset microphone and voice amplified via speaker box.Other advantage ...