Be the Coolest guy or girl of the Night with this cool, funky and attractive accessory! - Ideal for parties, music festivals, and concerts. Ergonomic, unisex design and made of stylish black shiny frames. - Easy and safe to use. Stylish and comfortable to wear. Easy to see out of, and the lights have no impact on vision at all. - A single button on the battery pack to toggle between the four lighting modes: steady glow/blinking/ FLASHING / off. - Glasses work with battery pack (2 AA Batteries) attached by wire ( NOT CORDLESS ). The pack and glasses are connected by a 35" wire. The pack can be easily hidden in your pocket, clothing or chip in the belt by the clip of the pack.