About this product: 【38 Ultra-Lightweight & Headlight】The main body of the headlight weighs only 38g, minimizing the burden on the head, and can be worn casually without feeling heavy even after wearing it for a long time. It frees up both hands, making it very convenient for night fishing, walking, car repairs, and other situations. 【High-Brightness LED Light & 45° Adjustable Illumination Angle】Brightness is 500 lumens, with a maximum illumination distance of approximately 100 meters. The illumination direction can be adjusted up to 45 degrees, clearly illuminating dark places as needed, and avoiding dangers. It's compact and very convenient to carry. 【USB Rechargeable & IPX5 Waterproof】No need to replace batteries, economical and energy-saving. It has a built-in 800mAh rechargeable lithium battery, and with a 3-hour full charge, it can continuously light for about 4-8 hours. The IPX5 waterproof design prevents water from entering, and it can be used not only for everyday use but also as a disaster prevention item in case of rain, earthquakes, power outages, etc. 【3 Lighting Modes & Sensor Detection Function】The headlight has 3 lighting modes (strong, medium, flashing SOS), which can be adjusted according to the situation, and can be easily switched with one hand. It is also equipped with a sensor function, and the LED headlight automatically turns on/off by sensing hand movements (within 15CM).