Portable audio fm radio waistband amplifier USB / TFcard slot with mircrophone /reverberation fucntion used for ... High lights:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF/SD card ... Keep working in 7-8 hours Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight 225g ( including ...