waistband loudspeaker/microphone TF /SD card or USB for music with mircrophone /reverberation for Yoga,Teaching,conference Item Name: Waistband loudspeaker/microphone Item No.: GS-106High lights:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting TF/SD card or USB for music ( mp3 format )With USB recharge connectorPower supply: ...