With 900 lumens of brightness and weighing only 100 g, the Swift RL is the most powerful of Petzl's compact headlamps. The Reactive Lightning technology uses a sensor to analyze ambient light and automatically adjusts brightness to meet the user's needs. The headband is reflective for night visibility. It features a two-part design that provides excellent stability during dynamic and demanding activities such as climbing, trail running, or skiing. The Swift RL is intuitively operated with a single button for easy control of all lamp functions. Rechargeable, it includes a five-level indicator for precise monitoring of the battery's charge status. Note: Battery is included.