With its 900-lumen brightness and total weight of only 100 g, SWIFT® RL is the most powerful of the Petzl compact headlamps. Using REACTIVE LIGHTING® technology, a sensor analyzes the ambient light and automatically adjusts brightness to your needs. The headband is reflective to remain visible at night. Its two-part construction provides 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.