waistband portable voice amplifier mp3,fm radio,reverberation function with headset mircophone used for entertainment,tech Specification ... :Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker, ... in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight 0 ...