Aluminium 0.5 Watt LED flashlight, precision machined high-strength aircraft aluminium casing with anodized finish, LED lasting for over 100,000 hours usage, over 15 lumens brightness, DC/DC regulator maintains stable light output for duration of use, flawless white beam, polycarbonate lens, water resistant, uses 2 x A size batteries, continuous runtime: over approx. 25 hours .