USB RechargeableBuilt-in high power battery, USB cable included, the headlamp will provide up to 6 hours of continuous light from a single charge. USB rechargeable headlamp provides long-lasting power for outdoor activities, runners headlamp only takes 2 hours to be fully charged via USB port (USB cable included). The lifespan of LED lights is over 100,000 hours, no worry about replacement. 3 Lighting Modes The headlamp includes 2 brightness levels and an SOS flashing mode in emergency cases. This LED headlamp allows you to easily change the brightness by pressing the button once and long pressing 1 to enter SOS mode. You can choose 3 different modes according to your needs. Waterproof and durable Our running lights are made with premium material, IPX6 water resistance and tested shock resistance make it durable and weatherproof, the operation of the headlamp can survive heavy rain and any impact in outdoor activities and common working conditions. The headlamp can be used safely in rainy or snowy days . Lightweight and ComfortableThe weight of the rechargeable headlamp is only 80g, the headlamp is perfect for long-distance users who are looking for a comfortable fit. The adjustable and extendable strap design makes the headlamp perfectly suitable for children and adults. Suitable for many activitiesThis running headlight is ideal for adults and children, dog walking, night reading, night fishing, hunting, jogging, cycling, camping, hiking, caving, even in an emergency at home or at work. Stay safe and well lit whatever your activity!