FEATURES of the Petzl Myo Headlamp Powerful, high performance lighting (370 lumens in Boost mode and 280 lumens in Maximum mode) Multi-beam lighting: wide-angle flip lens that shifts instantly from a wide beam (proximity lighting) to a focused beam (long-range vision) CONSTANT LIGHTING technology for Economic and Optimum modes: brightness does not decrease gradually as the batteries drain, automatically switches to reserve mode when batteries are nearly spent STANDARD LIGHTING technology in Maximum mode Several programmable lighting modes to adapt light intensity and burn time to the activity Battery charge indicator light: warns when the batteries are approximately 70% then 90% discharged Switches are protected from accidental operation when light body is in upright position Water and weather resistant for all-weather use Comfortable and stable in action: included top strap provides additional stability when needed Long burn time