The Princeton Tec ECO FLARE dive light is a top Quality light. This Super light features: Free 2 AAA Alkaline Batteries! Free Backup Bulb Free Lanyard Included A vital part of any outdoor enthusiasts or scuba divers equipment bag The Eco Flare can be used as high output constant on area/personal locator lights or as a flashing red L.E.D light that will burn in excess of 500+ hours on two AAA alkaline batteries The blinking red L.E.D. is perfect as a personal locator light for night and low visibility scuba diving, bicycling, in-line skating, etc. The Eco Flare can also be attached to your pet for easy identification in low light conditions Batteries: 2 AAA Alkaline Burn Time: 2-3 hrs. (High Output) Burn Time: 500+ hrs. (red L.E.D.) Weight: 1.5oz with batteries This Princeton Tech Eco Flare is a fantastic versatile light. Super for all diving and water sports needs.