Features a 1.00 in. diameter for weapons mounting, 1.25 in. diameter bezel, hard liquid ceramic coating, LED, glass lens, adjustable light levels, constant on, momentary, and strobe activation with rotary dial and tailcap combination. Powered by 2 CR123A batteries with a runtime of 90 minutes and 90+ lumens at full power, and 400+ hours at the lowest setting with .8 lumens. Waterproof to 50 meters, low battery indication, and auto temp. control.