Your guests on the dance floor will be dancing to the beat! They won't be the only ones! The Cool Light Up Shades are sound reactive. So as the music plays, the lights will pulse along with the beat. These glasses are the perfect party accessory for a 1980's event or New Year's Eve party. The Cool Ligtht-Up Shades come in a variety of colors. Be sure to pick up plenty of light up party favors for all of your guests!