Waistband portable teaching microphone headset,usb,tf card slot, mp3 ,fm radio,microphone,reverb used for teching and ... Mp3, FM radio, Amplifier, Line-in, loudspeaker, microphone, reverberationColor ChoiceBlackWeight 0.5kg ( including battery )Size128* ... :Headset Microphone : 1 pcRecharger : 1 pcHost Machine : 1 pcWaistband : 1 pcSpecification : 1 pc Waistband portable teaching microphone