Elzetta Bones is a bare bones, no frills flashlight with legendary Elzetta performance and durability. It generates 850 lumens in steady regulation with an optimum balance of throw and spill through its standard 7/8-inch thick optic. Operation is bone-simple. There are no secondary modes and on/off is achieved via the push-button which operates like a common ballpoint pen. The beam quality produced by the optic produces a hot spot with plenty of spill for situational awareness and transitions smoothly with no hard edge beam characteristics. Runtime is rated at 1.5 hours from two fresh CR123A batteries (included). An 18650 rechargeable battery may also be used (not included). Constructed of 6061-T6 aluminum with Type III gray hard anodizing gray for extreme hardness and long wear. Fully potted electronics, another essential Elzetta advantage, keep circuit boards and solder joints sealed and secure. Made in the USA by Americans.