SureFire's G2X(TM) LED flashlight illumination tools share many features, such as virtually indestructible high-efficiency LED emitters, 320 lumens of maximum output, precision reflectors, and sleek NitrolonA(R) polymer bodies. Their differences let you select the ideal light for your needs. Choose single- or dual-output. Both of these illumination tools are ideal for outdoor use, emergency preparedness, everyday carry, or use by EMTs and other first responders. 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