Trail Runner II USB comes with a USB charging function and also a great light output of 140 Lumen. This head tourch is a lightweight choice for running and lets you exercise anywhere and at any time. The ergonomic headband is extra wide and anti-slip treated, for a comfortable fit on your head. The USB charging function makes it easy to re-charge your headlamp via the computer, perfect if you use it to and from work. The Trail Runner II USB uses the light distribution technology Silva Intelligent LightÂ®, a unique combination of long distance spot light and close range flood light at the same time â€“ light where you need it.