Bluetooth speaker power rating 6 watt system 1 way system speaker system 20 stereo principle active frequency response 80 20000 hz power supplies rechargeable battery usb battery life 14 h charge time 3 hrs type of battery lithium ion battery capacity 1 200 mah charging port usb colour black front colour black housing surface rubber functions dual speaker pairing usb host ipod synchronisation protective properties waterproof protection cla