Features: Virtually indestructible LED emitter regulated to maximize light output and runtime Two output levels-high for maximum light, low for extended runtime Precision micro-textured reflector creates smooth, optimized beam Tough polycarbonate window resists impact Tough NitrolonA(R) body, anodized aluminum bezel Dual-output tailcap click switch-press for momentary-on low, click for constant-on low, return to off then press or click again for high Weatherproof-O-ring and gasket sealed Includes high-energy 123A batteries with 10-year shelf life