Slim, unobtrusive, and extremely powerful, the E2E Executive Elite is a favorite of undercover police officers, who appreciate the fact that this penlight-sized flashlight is as bright as a four D-cell flashlight yet small enough to hide in a pocket. CNC machined from aerospace-grade aluminum with a choice of super-hard Military Specification Type III hard-anodized or a standard hard-anodized Satin Grey finish, the E2E comes with a tempered Pyrex (r) window, high output lamp assembly, removable steel pocket clip, and two 10-year shelf life lithium batteries . The light also features switching favored by law enforcement—twist for constant on, or depress the tailcap button for momentary illumination (great for signaling with Morse Code). A patented lock-out tailcap allows the light to be locked in the off position to eliminate accidental activation when stowed away. Batteries - Two lithium 123A 3.0 Volt with 10-year shelf life (included) Output/Runtime - SureFire MN03 xenon gas-filled lamp assembly provides 60 lumens output for 1.25 hours. Also accepts optional MN02 lamp assembly with 25 lumens output for 2.5 hours Construction - CNC machined aerospace-grade aluminum. Hard anodized finish for extreme corrosion impact and wear-resistance, and a tempered Pyrex (r) window, removable steel pocket clip Length and weight (with batteries) - 4.5 inches / 3.1 ounces Flawless white beam, always in focus Patented lock-out tailcap feature allows the light to be locked in the off position to prevent unintentional activation during storage or transportation Lightweight and slim, with an upgraded removable steel pocket clip Weatherproof Perfect for placement in your backpack, glove compartment, toolbox, or pocket. You´ll only notice it when you need it. 2 Finishes available: Satin Gray and Type III Hard Anodized.