Shockwave LED features Princeton Tec's proprietaryoptics, three Maxbright LEDs, two light levelsand LED heat regulation. Three 3W MaxbrightLEDs pump out 400 lumens of pure brute powerwith two modes of illumination, high for super bright andlow for extended battery life. The light output is calibratedfor both close-range tasks or for spotting at a distance.Impact-resistant and waterproof to 100 meters. Runson eight C-size alkaline batteries (included) for up to20 hours. Made in U.S.A.