【ULTRA-LIGHT AND COMFORTABLE】: The headlamp is super lightweight (only 42g) and compact, so you won't feel any pressure on your head. The breathable and adjustable elastic headband is perfectly suited for adults and children, keeping the lamp comfortable and stable on your head, even while running. 【SUPER BRIGHT ADJUSTABLE ANGLE】: The 100 lumen brightness provides visibility up to 60 meters. It can enlarge the illumination area compared to other lamp beads and provides excellent brightness for all night activities. The beam angle of the headlamp can be adjusted up to 60 degrees with simple up and down movement, allowing you to illuminate the spot where you need it. 【USB RECHARGEABLE】: With a built-in 800mAh rechargeable lithium battery, this powerful headlamp provides an illumination time of up to 12 hours (at low brightness) or up to 5 hours (at high brightness). It only takes 2 hours to fully charge via the USB port (USB cable included). The lifespan of the LED lights is over 100,000 hours, no worries about replacement. 【IPX4 WATERPROOF】: Waterproof headlamp is suitable for indoor and outdoor use, regardless of rain or snow. So you can use it for night reading, dog walking, night fishing, hunting, jogging, cycling, camping, hiking, caving, DIY, night repairs or even in an emergency at home or at work. Product Name: Head-mounted Sensor Headlamp Product Code: KO3 Optional Color: Black Product Size: 65MMx40MMx40MM Product Weight: 42g (Built-in rechargeable lithium battery) Shell Material: ABS | PC material Highlight Power: 500 Lumens Waterproof Rating: IPX5 Irradiation Range: 10 meters Energy Storage Method: Built-in polymer rechargeable lithium battery Flash Mode: Highlight | Medium Brightness | General Light | SoS Area of Use: Night fishing, bait change | Night running sports | Other night operations.