The SureFire G2ZX CombatLight Flashlight was specially designed to meet the needs of tactical professionals. This flashlight may be small measuring only 5.2 inches in length and weighing just over 4 ounces but it is powerful. This compact flashlight has the capacity to produce high-intensity light up to 320 lumens for a full 2 1/2 hours. Distance 187 meters.The SureFire G2ZX CombatLight Flashlight features a push-button tail cap switch for quick and easy activation. It also features a nearly indestructible LED emitter paired with a precision reflector for a smooth beam of light.