Maximised Illumination: Featuring Luminus SST40 white and Luminus SST20 warm white LEDs, boasting up to a potent 1600 lumens white light output, paired with a separate 800 max lumen warm white beam for superior visibility in misty settings Comfortable & Secure Fit: Equipped with a removable bi-directional, click-adjustable Sport fit headband for customisable comfort on-the-go, featuring a built-in low-profile whistle for emergency situations and reflective outer strips for added safety Long-lasting Runtime: Extended runtime up to 300 hours on the 5 lumen mode, rechargeable via the inner waterproof USB Type-C port Robust Construction: Constructed with a lightweight magnesium alloy body for durability, complemented by IP68 rating (dustproof & 2m depth) and 2-metre impact resistance Efficient Power Management: Integrates power-saving functionalities, including physical and electronic lockout mechanisms to prevent unintended activation, along with constant light output circuitry to maintain consistent brightness Versatile Lighting Modes: Multiple brightness levels and beam options allow you to adjust the light intensity and color temperature to suit various outdoor activities and weather conditions Lightweight Design: Weighing minimal with its magnesium alloy construction, this headlamp provides comfortable wear during extended running sessions and outdoor adventures without causing neck strain