VISION HD Focus features MAXVIZ technology that offers outstanding beam natural color and 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 and 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.