Rear Bike Light by Geared2U - Extremely Bright 9 LED 3 Function Bicycle Taillight - 2 AAA Batteries Included - Fast & Easy To Install **** EXTREMELY BRIGHT, THIS LIGHT HELPS KEEP YOU SAFE - 9 Super Bright LED Lights provide more than enough illumination so all drivers will see you in all weather and lighting conditions - including full darkness. FLASHING AND UP AND DOWN MODE MEANS YOU STAND OUT IN CONGESTED TRAFFIC -Drivers naturally keep clear of a flashing light. 3 Modes of illumination means that you can operate the light the way you want to so you can be seen and ride your bike worry free! READY TO GO RIGHT OUT OF THE BOX - 2 AAA Alkaline Batteries Included - you don't need anything else. EASILY MOUNTED AND REMOVED. You can move this light to any bike you like. 100% LIFETIME GUARANTEE. No questions asked, for as long as you own the light!