Bluetooth speaker portable speaker power rating 4 watt speaker system 10 mono principle active frequency response 90 18000 hz noise level 80 db impedance 4 ohm power supply rechargeable battery battery life 3 h type of battery lithium ion battery capacity 600 mah colour green functions streaming speakerphone function usb host controllable via buttons control feature bluetooth pairing design mini speaker analogue input 35mm jack line in