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,Music play and FM radioSupporting TF Card and USB for music ( mp3 format )With USB recharge connector( USB 1.0)Power supply: rechargeable with high capacity Lithium battery, keep ...