Azur Opal Battery Light SetThis set of front and rear LED lights is powered by AAA batteries, making it perfect for people who only use their lights occasionally, and want a light that will hold its charge for a long time between uses.The front light has an elastic wrap-around mount for the handlebars, and the rear light has a band that fits around the seatpost.The front light is 3W, and the rear is 0.5W.Steady and flashing modes. Batteries included.