... Mini Digital SpeakerOFF/ON:Turn on the power switch, when the LED on, the speaker start to work. Use 3.5 Connecter and ... to cell phone, use 3.5 connecter,and control the volume via cell phone.Playing with Medium volume, can last for 5 ... below 650Ma,5.0V,While charging, don’t play. Fashionable Mini Digital Speaker With Player-Red