Ultra Light and Adjustable: The hands-free led headlamp weighs only 45g, easy and light to carry. With breathable elastic headband and 60 adjustable angle, which can easily adjust the length to fit your head size perfectly. It is perhaps the most comfortable headlamp for adults and children. USB Rechargeable: The running headlamp adopts built-in 800mAh lithium-polymer battery technology to meet your needs. needs. Downtime up to 12 hours and running time up to 5 hours as proven by our experience. Compatible with all USB ports. Full charge only takes 2 hours via USB port (USB cable included). Industry-leading LEDs enable a lifespan of over 100,000 hours. 5 Modes & Daylight: Designed with 4 light modes (WHITE: 200 lumens high brightness, 100 lumens medium brightness, 50 lumens low brightness, SOS strobe). The maximum brightness can illuminate the road up to 100 meters. In addition, thanks to the memory function, you can reuse the last mode used, which is much more convenient to avoid going through all the modes. IPX4 waterproof: Heavy rain or splashes of water Water are no longer an issue when using this powerful LED headlamp for any indoor or outdoor activity. The best companion for dog walking, camping, running, cycling, hiking, caving, mountaineering or even in an emergency at home or at work. Reliable and Durable Quality: It adopts sturdy ABS material to build this usb headlamp, can withstand strong or any impact during outdoor activities or work. Perfect gift for family and friends.