VISION HD Focus features MAXVIZ technology that offers outstanding beam natural color & optimized contrast, giving you an expanded field of high-definition vision. The Energizer patented Digital Focus technology allows you to have optimum control of your light for enhanced direct & peripheral vision. Exceptional user control with enhanced light output makes this light ideal for the home, vehicle or workplace. Runtime is 4 hours. Beam distance is 115 meters. This advanced LED flashlight with 400 lumens runs on two AA batteries.