Partner With Power. Developed as a backup light for law enforcement professionals, the E1B's performance and durability have helped heroes in all walks of life. The latest version features our broad, useful MaxVision BeamA(R), which shapes the output into a smooth seamless beam that keeps you aware of your surroundings. It's the perfect partner for close-range applications, with two useful outputs - 400 lumens and 5 lumens - and it's programmed to lead with high output, just like a tactical/self-defense light should. Use it to confidently deal with friend or foe. Features: The ultimate compact backup light Useful dual output, powered by a single 123A battery Two-way pocket clip helps you hide it anywhere High-performance LED and specially developed reflector create wide, smooth MaxVision Beam(TM) Constructed of high-strength aerospace aluminum with Mil-Spec anodizing; stainless steel pocket clip; coated, tempered window Weatherproof-O-ring and gasket sealed Powered by a single energy-dense 123A battery with 10-year shelf life Backed by SureFire's No Hassle Guarantee