MAG-LED Technology known for their obsession with precision engineering, craftsmanship and commitment to perfection, was not satisfied with the performance of a "regular" LED as a usable light source. They set their sights on producing a light source that would not only incorporate longer battery life, but would also have the kind of durability, reliability, and performance Maglite® flashlights are known for. With an emphasis on uncompromising performance, MAG-LED Technology is the result of that quest. The benefits include: A Powerful Projecting Beam that focuses simply by rotating the head. Balanced Optics, combining a highly refined reflector with a quality LED, for a brilliant adjustable beam. Intelligent Energy Source Management (patent pending) balancing high brightness with extended battery life. PLUS: All of the quality features professionals and consumers expect from a Mag® flashlight: Rugged, machined aluminum construction with knurled design. Anodized inside and out for improved corrosion resistance. Water and shock resistant.