Advanced Lighting Systems HDL121R is a high-efficiency COB LED headlamp that provides superior light for your work environment. With its detachable design and magnetic back, you can use it in various ways - as a headlamp, a handheld light, or attached to any metal surface. It's also glow-in-the-dark, making it easy to locate in the dark. The HDL121R is IP65 dust and water-resistant and drop impact resistant and features a brightness memory function, which remembers your last used brightness setting so you can quickly get back to work.