portable mini bluetooth speaker 1,high quality sound 2,hands free 3,echo and noise reduction Model No.: BSK02portable mini bluetooth speakerKEY FEATURES*Best ... : MFB, VOL+, VOL-, Slide switch,* LED Status Indicator: Blue, Red,* Mini 5 Pin USB charging Port* Color: greenPOWER:* Rechargeable 270mAh Li ... :-10 °C~50°C*Storage Temperature:-20 °C~80°CPhoto: portable mini bluetooth speaker