You've never seen LED sunglasses like these before! These spaceman-like frames feature 8 LED lights (4 blue and 4 green) and 4 LED lights at the temples. 3 modes: fast flash, slow flash, and solid on. You can change these modes using the switch near the battery compartment behind the right ear. One size fits most. These shades feature a spaceman-like frame, where one solid lens covers both eyes. Made from sturdy clear plastic. Battery compartment and mode switch behind right ear. Batteries replaceable - requires a small Phillips screwdriver to replace.