Rayovac DIYHPHL-B Indestructible 100 Lumen Headlight with Batteries Energy saving mode allows for 15-hour run time An amazing 300-foot (100m) beam distance Features a cloth silicone head strap for comfortable hands-free use Water resistant, lifetime guarantee, and includes 3 AAA batteries Shock proof and impact resistant; drop test verified for 30 feet, way above the industry standard of 3 feet