Ultra Lightweight and Adjustable: The hands-free LED headlamp weighs only 45g, easy and lightweight to wear. With a breathable elastic headband and a 60° adjustable angle, which makes it easy to adjust the length to perfectly fit your head size. It may be 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. It has a standby time of up to 12 hours and a working time of up to 5 hours, as proven by our experience. Compatible with all USB ports. It only takes 2 hours to fully charge via the USB port (USB cable included). Industry-leading LEDs provide a lifespan of over 100,000 hours. 5 Modes & Daylight: Designed with 5 lighting modes (WHITE: ① 200 lumens high brightness, ② 100 lumens medium brightness, ③ 50 lumens low brightness; RED: ① red light, ② red SOS strobe). The maximum brightness can illuminate the road up to 100 meters. Moreover, with the memory function, you