Using this strap allows the use to create a headtorch ranging from 1000-2000 lumens, dependent on light head & battery combination. * Note, this product does not include the PWR bank or PWR light head The Story Knog makes innovative products that inspire people to explore the great outdoors. Knog has been designing innovative products since 2002. We want to be with you in the rain, in the sun, lighting up dark laneways, helping you see, and helping you be heard. We design products so we’re with you on the town, on the road, and in the wilderness.