Portable audio fm radio waistband amplifier USB / TFcard slot with mircrophone ... in 7-8 hours Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight 225g ( including battery )Size97*87 ... , Conference,Acoustic Instruments,Camping and other outdoor Entertainment Accessories: Headset Microphone : 1 pcRecharger : 1 pcHost Machine : 1 pcWaistband : 1 ...