Surrounded by 3 LED lights on each clear-lens (red-green-blue), these 6.25" light up goggles are sure to astound. They are fastened with an adjustable strap on the back, to ensure they remain comfortable over your eyes. With three modes of flashing, the approximate run-time of these specs is approximately 12 hours; allowing all-night use, raving well into the sun-up hours. 2 CR1616 Batteries are included.