rechargeable portable amplifier 1.mp3,fm radio,reverberation function 2.headset mircophone ... guider,travler Specification:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF Card and USB ... Keep working in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight 0.5kg ( including ...