The Cateye Nano Shot Bicycle Light is compact in size, light in weight and yet delivers a massive output. The OptiCube technology used in the headlight produces a wide and powerful white beam and allows one to see things clearer through foggy, misty, or moderately bright surroundings. There are three modes that one can set the headlight for: High, low, and flash. The Li-Ion battery of the light is capable of giving a 12 hour runtime in one go. One can charge it with the supplied USB cable that takes 3.5 hours for a full charge.