Bluetooth speaker portable speaker power rating 20 watt speaker system 20 stereo principle active frequency response 65 20000 hz power supply rechargeable battery battery life 20 h charge time 45 hrs type of battery lithium polymer battery capacity 6 000 mah charging port micro usb colour black front colour black functions battery charger streaming speakerphone function protective properties splashproof waterproof protection class ipx7 cont