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 is designed in two parts, providing excellent stability during dynamic and engaging activities such as climbing, trail running, or skiing. The Swift RL is intuitive to use and features a single button for easy control of all lamp functions. Rechargeable, it has a five-level display for accurate monitoring of the battery's charge status.