... mircophone used for entertainment,tech Specification:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker ... , good penetration.Aluminium magnesium alloy material, professional and fashion appearanceTechnique Data: Output power12WFrequency Response100Hz ... in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight ...