Specifications: There are 32pcs RGB LEDs on the product, and it can flash 32 different kinds of patterns. The bicycle wheel light is trolled by the riding speed, the faster the riding speed, the more complete and beautiful the pattern. When the cycling speed is up to 25kms/hour, the lighting pattern will be very clear and complete. It has built-in light sensor and vibration sensor, working only at night and in the dark, and it will turn off automatically in 60s after cycling stop. The light is shockproof and rainproof, suitable for all kinds of weather. This bike light is suitable for standard spokes on standard bikes with wheel diameter ≥20 inch. The bicycle spoke light does not have a button for turning on/off, and it is powered by 3pcs AAA batteries(not included). It is very easy and fast to install the light on foldable bicycles, road bikes, mountain bikes, etc. Type: Bike Tire Spoke Light Material: Plastic, Electronics Battery: 3 x AAA Batteries (Not Included) Features: Waterproof, Colorful LED, 32 Light Patterns, Bike Decor Light Size: 16.3cm x 3.7cm x 1.4cm/6.42" x 1.46" x 0.55" (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 Bike Tire Spoke Light