Underwater Kinetics 4AA Right Angle eLED Zoom Flashlight 40/13 lumens, 328/100 high, 177/54 low, ft/m Alkaline: 4-5 Hours (High); 25+ Hours (Low); Lithium: 9-10 Hours (High); 40+ Hours (Low) Unique eLED circuitry maintains constant brightness for 80% of alkaline battery life Push-button thumb switch switches light between ON/OFF and high/low intensity with continuous or momentary action Waterproof to 10 meters