... portable voice amplifier mp3,fm radio,reverberation function with headset mircophone used for entertainment,tech Specification:Multifunction all in one with Entertainment,Microphone, Amplifier ... working in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight 0. ... : 1 pcWaistband : 1 pcSpecification : 1 pc waistband portable voice amplifier