Our White LED Sunglasses have a retro style and a very modern feature. They light up! Press the on/off button to choose from 3 different light settings; steady on, fast flash, and slow flash. For even more fun flip the switch and they turn in to a sound reactive light up pair of sunglasses! Bright white LEDs will flash to the beat of the music. These sound activated LED sunglasses are perfect for clubs and concerts. One size fits most! AG13 batteries included & installed.