USB FM radio waistband amplifier with reverberation of sound with headset microphone used for yoga,tour guide, ... working in 7-8 hours Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight 225g ( including ... Conference,Acoustic Instruments,Camping and other outdoor Entertainment Accessories: Headset Microphone : 1 pcRecharger : 1 pcHost Machine : 1 ...