Provides a 1000 lumen blast of light for maximum illumination while clearing a room or searching an alley. Its wide beam pattern lights up large areas so you can identify who or what is nearby. C4 LED technology, impervious to shock with a 50,000 hour lifetime 283m beam up to 1000 lumens TIR optics produces a concentrated beam with optimum peripheral illumination Run Time: 1.50 hours regulated run time. Solid-state current regulation for consistent illumination level Powered by two 3-volt CR123 lithium batteries with 10-year storage life Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands i Mfg: Streamlight