Iconic for trails and ultra-running! The NAO® RL rechargeable headlamp provides 1500 lumens of brightness and weighs just 145 grams. Comfortably balanced, the headband is easily adjustable and maintains excellent support throughout long and committing races. With REACTIVE LIGHTING® technology, the brightness automatically adapts to the ambient light. Manual operations are reduced and burn time is optimized. Additionally, red lighting at the rear of the headlamp allows you to remain visible at night. Lighting for movement automatically adapts to ambient light: Wide, uniform beam so you can comfortably see up-close or at your feet Mixed beam (flood and focused) allows for proximity and distance vision for movement Three white lighting levels: max burn time, standard (better power/burn time balance), and max power Longer burn time, greater visual comfort, and less manual operation with Reactive Lighting mode, which allows the light sensor to automatically adjust brightness and beam patter