... 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,Music play and FM radioSupporting TF Card and ... in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ...