Rechargeable Headlamp Fully charge with 2 x 18650 batteries from any USB port in just 4 hours and provide up to 30 hours of constant light on a single charge. Mini USB Cable is included, this headlamp can only be used and recharged when it contains batteries.^3 adjustable modes Top LED chip can up to 800LM, Strong / Weak / Flash for long range vision and durable use.A great personal lighting system for fishing, cycling, climbing, mountain biking, camping and so on^Zoomable beam The dispersion of the light is also adjustable either a concentrated point or a larger lighting surface^Comfortable to wear Plastic parts with pad sponge make parts next to your head soft, allow you to wear, Small size and light weight, it is easy to take^Adjustable Lamp The lamp is adjustable from side and top. The inclination of the lamp is adjustable by 90 . Easy to install and place on the head, one button to control several different light modes, make life easier and safer, Perfect gift for family or friends