This is the flashlight that provides up to 30 days of continuous light for optimal emergency preparedness. Its highly efficient LED bulb uses a fraction of the energy of traditional bulbs to produce 720 consecutive hours of light on its lowest setting using only three D batteries (not included). On high, it generates a bright 300 lumen beam that casts broad, clear light up to 121' away. It's rugged, aircraft-grade anodized aluminum housing is water- and shock-resistant and the rubberized handle enables a sure grip. The flashlight has two light output levels and a flashing mode (provides 16 hours of light on high). The LED is rated to last over 60,000 hours. 12" L x 2" Diam. (1 3/4 lbs.)