Description of Surefire E1L Outdoorsman Flashlight Ultra compact (finger length), dual-output mini LED flashlight with extended runtime. Its virtually indestructible, two-stage light-emitting diode (LED) light source produces a smooth, pre-focused beam that, at maximum output, is over twice as bright as that of a big two-D-cell flashlight. At its low setting it produces a useful three lumens of light and continues producing useful light levels for 40 hours on a single lithium battery. Small size (it’s lightweight enough to clip to hat brim for hands-free operation), dual output, extended runtime, and 10-year battery shelf life make the E1L perfect for camping, backpacking, travel, emergency/disaster preparedness kits, or as an everyday-carry for general use. Features: Dual-output LED light source has no filament to burn out or break, lasts for thousands of hours Rugged aerospace-grade aluminum body, Mil-Spec Type III hard anodized in olive drab O-ring sealed, weatherproof Total Internal Reflection (TIR) lens Pocket clip Tailcap switch: press for momentary-on, press further to click constant-on Switch lockout prevents accidental activation during transport or storage