The Knog Plus Light Twinpack Lighting Set is ideal for being well seen in the dark. The set consists of a front and rear light. Both lights have 5 different modes, the front light has a beam of 40 lumens and the rear light one of 20 lumens. These lights are not only useful to use on your bike, but also to attach to your helmet, shirt or backpack. You attach them easily with the supplied rubber straps or slide them to a garment or bag. The lights are easy to charge via USB and can be used again for a while!