Features:Virtually indestructible LED emitter regulated to maximize light output and runtimeTwo output levels-high for maximum light, low for extended runtimePrecision micro-textured reflector creates smooth, optimized beamTough polycarbonate window resists impactTough NitrolonA(R) body, anodized aluminum bezelDual-output tailcap click switch-press for momentary-on low, click for constant-on low, return to off then press or click again for highWeatherproof-O-ring and gasket sealedIncludes high-energy 123A batteries with 10-year shelf life