Fashionable Mini Digital Speaker 1. With Playe Function 2. Suitable For:Mp3,Mp4,SD Card,U- ... :Turn on the power switch, when the LED on, the speaker start to work. Use 3.5 Connecter and U-Disk ... .5 connecter,and control the volume via cell phone.Playing with Medium volume, can last for 5-6 hours.If repeat ... ,5.0V,While charging, don’t play. Fashionable Mini Digital Speaker With Player