Bluetooth speaker portable speaker power rating 16 watt speaker system 20 stereo principle active frequency response 75 20000 hz sensitivity 80 dbmw amplifier type digital power supply rechargeable battery battery life 10 h charge time 3 hrs type of battery lithium polymer battery capacity 3 000 mah colour black front colour black functions airplay battery charger streaming dual speaker pairing speakerphone function bluetooth multipoint nfc