Add a flash of light to your bike spokes with these Spin Sport Brightz Bike Lights! Each set includes three 5.5” lights that clip to bicycle spokes and are powered by 2 button-cell batteries (included). The color morphing lights constantly cycle through lights and flash patterns. The pink, blue, and green lights can be set on fast flashing, slow flashing, and constant. The lights are weather resistant and don’t require any special tools for installation. Bike lights are a great way to make your bike the coolest in the neighborhood and to help you be more visible in the dark. ~Rachel E.