With 900 lumen brightness at only 100g, 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. It has a two-part construction for excellent stability in dynamic and committing activities such as mountaineering, trail running or skiing. SWIFT RL is intuitive, with a single button for easy control over all lamp functions. Rechargeable, it has a five-level gauge for precise monitoring of the battery charge level.