portable waistband amplifier with USB with USB or TF card slot with headset microphone used for yoga,tour ... 7-8 hoursFunctionMp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight225g ( including battery )Size125 ... Conference,Acoustic Instruments,Camping and other outdoor EntertainmentAccessories:Headset Microphone : 1 pcRecharger : 1 pcHost Machine : 1 ...