Headlamp with two light modes, high (50 lumens, 5.5 hour runtime) and low (10 lumens, 25 hr. runtime) ;Features an adjustable rubber/elastic combination head strap and a clip that attaches to the brim of your hat, coat lapel or car visor;Unbreakable lens; waterproof to 1m for one hour;Impact-resistant housing - drop-test verified;Powered by a AAA alkaline batteries