Bluetooth speaker effective output 9 watt system 2 way system speaker system 10 mono principle active frequency response 100 20000 hz sensitivity 80 dbmw impedance 4 ohm power supply rechargeable battery battery life 6 h charge time 2 hrs charging port micro usb colour white protective properties splashproof controllable via buttons control features volume control bluetooth pairing number of full range drivers 3 number of passive radiators