NovaTac 120M Military OPS LEDFlashlight, Desert Tan 3 Pre-set brightness levels for maximum versatility (0.3, 10 or 120 Max Lumens) Disorienting strobe and momentary maximum mode can be used as safety/signal feature Extended Tactical button makes it easy to turn on/off even while wearing gloves Powered by (1) CR123 battery (included) Runtimes: 120 lumens/30 min., 10 lumens/14 hrs., 0.3 lumens /240hrs. Measures 3.3 inches long by 1 inch wide and weighs a mere 3.1 oz.