LED Bike Light Set Bicycle Headlight and Taillight Quick Release Waterproof for Road Racing Street & Mountain Bikes etc 5 LED Bike headlight, 165 feet/ 50m range, tool-less handlebar, mount bracket Fits for Handle Bar Diameter: 0.9 - 1 inch/ 23-25 mm. 2 modes: continuous/ flash. 5 LED Rear Warning Light, angle adjustable mount; 7 modes; Mount Bracket Fits for Bar Diameter: 19-26 mm. Use 4 x AAA, 2 x AAA batteries (Not included), up to 10 hours lighting. LED Lifespan: Up to 100,000 hours. Weather resistant Easy installing in seconds, quick release.