Zebralight H600w XM-L 18650 Headlamp Neutral White Smart user interface provides fast and easy access to all brightness levels Precision machined unibody casing from premium grade Alcoa aluminum bar stock Ultra clear lens with anti-reflection coatings on both sides Automatic stepping down from High to Medium, and from Medium to Low when the battery capacity is low Waterproof to IPX8 (2 meters, 30 minutes)