Features:32 LEDs with four colors (blue， green， red and orange)， double-sided.Light with 32 gorgeous and cool flower patterns shining by turms.Equipped with light sensor and movement sensor， flash only in the dark and action.Fix on spokes of bike with three rotary bolts.Powered by three AAA batteries (not included).Water proof design， can be used in rain.Easy installation.Note: The wheel light can be used in rain but can not be soaked in the water.Specifications:Quantity of LED: 32Color of light: Blue， green， red and orangeMaterial: PlasticLimit of wheel diameter: 20in and above Requirement of speed: 20km/h and aboveProduct size: 16 * 9 * 2.3cm / 6.3 * 3.5 * 0.9in (max.)Product weight: 65g / 2.3ozPackage size: 16.5 * 10 * 2.3cm / 6.5 * 3.9 * 0.9inPackage weight: 89g / 3.1ozPackage including:1 * 32 LED Wheel Light