Projecting Beam focuses simply by rotating the head. Balanced Optics provide a focusing, 3 watt led, optimized to produce a powerful beam. Intelligent Energy Source Management - balancing optimum high brightness with extended battery life (patent pending). Maglite LED - interchangeable between LED and Krypton lamp (spare Krypton lamp included in tail cap) Mag LED flashlights build on the experience in craftsmanship, engineering, and advance technology evident in all Mag flashlights. The Maglite flashlight is internationally accepted as the Professional Flashlight. Patented features now combined with MAG-LED technology make the Maglite LED flashlight a technologically advanced lighting instrument.