... Traveling activities 2.Unique Automatic Anti-Feedback System 3.Lightweight design If you're are a teacher, presenter, priest, coach ... use at the office,home and wherever else3.Fashionable design, portable4.Loud sound and clear tone quality5. Remote ... long performance life.Notice: More detail information, please refer the Instruction Manual before use. ( function(){ var aBigImageSrc = [ 'http://i00.i ...