ax Output (Cool White)  45 / 170 / 420 / 900 Lumen Runtime (4 x CR123A)  45 / 9.5 / 3.5 / 1.2 Hours Runtime (2x18650)   55 / 12.5 / 4.5 / 1.5 Hours Operations Select brightness by dialing the brightness ring   LED  Seoul Semi-Conductor Z-Power P7 D-Bin LED Length 6.3 inches (16.0 cm)   Diameter Head Diameter: 2.4" (6.1 cm) Body Diameter: 1.5" (4.0 cm)   Width Body Width: 1.0" (2.6 cm)   Weight 12.3 ounces (350 grams)   Battery Four Lithium CR123A batteries (Optional: Two EagleTac 18650 2400mAh Protected Li-ion Batteries) * Do not exceed input voltage of 13V   LED Color Cool White Supplied Accessories Spare O-rings, Stainless Steel Bezel (installed), CR123A Battery Magazines, Aluminum re-enforced Battery Tray, Mil-spec Para-cord Lanyard with quick detach ability, Heavy Duty Nylon Holster w/ Flip and quick detach ability, User Manual