... portable mini bluetooth speaker 1,high quality sound 2,hands free 3,echo and noise reduction Model No.: BSK02portable mini ... 2.402-2.480GHZ, 2.4G ISM band,* Radio Performance: Receive Sensitivity of -90dBm, TX Power ... -, Slide switch,* LED Status Indicator: Blue, Red,* Mini 5 Pin USB charging Port* Color: greenPOWER:* Rechargeable 270mAh ... Temperature:-20 °C~80°CPhoto: portable mini bluetooth speaker