EASILY ATTACHES TO HANDLEBARS - These universally-sized handlebar lights stretch securely over the ends of your existing handlebar grips for added side visibility BUILT TO WITHSTAND THE ELEMENTS - These bicycle lights are weather-resistant, so they can handle whatever Mother Nature dishes out on your ride BE SEEN, BE SAFE + HAVE FUN - The bright, attention-getting light given off by these LED grips give you and your family members important side visibility while providing a fun pop of color on any ride AVAILABLE IN RED AND COLOR-CHANGING DISC-O - These lights can be set to glow or flash red. The Disc-O LED option will continuously cycle through the color spectrum for a fun effect LONG LASTING REPLACEABLE BATTERIES INCLUDED - 2 2016 lithium batteries are included and will power your light for 25+ hours WORRY-FREE GUARANTEE - all Nite Ize products are backed by our Worry-Free Guarantee