With 900 lumen brightness at only 100 g, SWIFT RL is the most powerful of the Petzl compact headlamps. With REACTIVE LIGHTING® technology, a sensor analyzes the ambient light and automatically adjusts the brightness to user requirements. The headband is reflective for night visibility. Its two-part construction ensures excellent stability in dynamic and intense activities such as mountaineering, trail running and skiing. SWIFT RL is intuitive, with a single button for easy control of all lamp functions. It is rechargeable, with a five-level gauge for precise monitoring of the battery charge level.