Nite Ize SpokeLit LED Spoke Light-2 Pack EASILY ATTACHES TO BICYCLE SPOKES - This bright bike wheel light presses and slides securely into place on common 3-spoke cross pattern wheels, regardless of the size or type of bike. Attach and ride confidently LED SPOKE LIGHT CHANGES COLORS + FLASHES - The fun Disc-O LED will automatically cycle through the spectrum of colors creating a bright ring of light when you turn it on, or press twice to set it to red flashing mode for high visibility BUILT TO WITHSTAND THE ELEMENTS - These bicycle lights are weather and shock resistant and are housed in a tough plastic casing, so they can handle whatever Mother Nature dishes out on your ride BE SEEN, BE SAFE + HAVE FUN - The bright, attention-getting ring of light created by these LED spoke lights give you and your family members important side visibility while providing a fun pop of color on any ride 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