rechargeable portable amplifier 1.mp3,fm radio,reverberation function 2.headset mircophone 3.used for techer,guider,travler Specification:Multifunction all ... , Gymnastics,Teaching, Conference,Acoustic Instruments,Camping and other outdoor EntertainmentAccessories:Headset Microphone : 1 pcRecharger : 1 pcHost Machine : 1 pcWaistband : 1 pcSpecification ...