Kaaka Universal Bicycle Front & Rear Wheel LED Spoke Lights - Waterproof Cycling Safety Lights for Night Riding, Hub Bottom Bracket Warning Lights (Multi-Color) - Perfect for Commuting, Mountain Biking & Urban Cycling Safety

Specifications: Installed in the center position of the wheel. It will not affect the center of gravity of the whole bicycle. Three kinds of flashing modes, quick, slow, steady lighting controlled by a switch on side of light. Type: Bicycle Hub Light Material: ABS Modes: Quick Flash, Slow Flash, Steady Lighting Powered by: 3 x LR44 Batteries (Included) Features: Easy Installation, Front/Tail Wheel Mount, Wheel Decor Size: 9.5cm x 1.7cm/3.74" x 0.67" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bicycle Hub Light