Features of the Petzl Swift RL Pro Designed for the workshop, small maintenance jobs, or concerts and shows, the swift RL pro rechargeable headlamp provides 900-lumen brightness With its reactive lighting Technology, a sensor analyzes the ambient light and automatically adjusts brightness to user requirements It also has red lighting for stealth Swift RL prois intuitive, with a single button for easy control over all lamp functions Five-level gauge allows precise monitoring of the battery charge level Lamp is compatible with Petzl helmets, and mounting accessories allow it to be attached to a variety of helmet types