... Yoga,Teaching,conference Item Name: Waistband loudspeakerItem No.: GSG-YB001 High lights:Multifunction all in one with Entertainment,Microphone, Amplifier, Loudspeaker,Music ... , Amplifier, loudspeaker, microphone, reverberationColor ChoiceBlack,Red, BlueWeight 225g ( including battery )Size125*87.5*51.5mm Application: Used for Yoga, Gymnastics,Teaching, Conference ...