... ,usb,tf card slot, mp3 ,fm radio,microphone,reverb used for teching and so on Specification: ... Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF Card and USB for ... Keep working in 7-8 hours Function Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight 0.5kg ( including battery ...