FEIYANG Music Reactive Light Up Glasses Intelligent Bright Shutter Glasses.Best for Party, Clubbing,Concert,Carnival Night,Disco and Stage Performance AWESOME GIFTS:These glasses are particularly suitable for birthday parties,concerts and festivals,which sure make you stand out in a crowd SOUND REACTIVE:The glasses will flash with the music rhythm. There are four modes:constant light, flashing light, sound reactive(adjustable sensitivity), Off function EXCELLENT LIGHT OUTPUT: These EL wire-frame definitely is top of the heap in quality construction,and it looks like you have a neon sign on your head EXCELLENT FRAME DESIGN:The frame fits a wide range of face shapes.Its comfortable to wear and easy to see through without obstructing your vision Take these special glasses and increase the festive atmosphere,you will feel relaxed and more enjoyable in a party