Features:14 LEDs (single-sided) with 3 colors (white， blue and green).Light with 40 different gorgeous patterns and 5 groups of words shining by turns and changing every 2 seconds.Pattern is clear and complete when speed is up to 15km/h.Equipped with magnet sensor， flash continuously in the action.Automatic and manual power on and automatic power off.Powered by three AAA batteries (not included).Easy installation.Note: The bike wheel spoke light can be used in rain but can not be soaked in the water for long time.Specifications:Quantity of LED: 14Color of light: White， blue and greenMaterial: ABSRequirement of speed: 15km/h and aboveProduct size: 23 * 5.5 * 2.2cm / 9.1 * 2.2 * 0.9inProduct weight: 73g / 2.6ozPackage size: 27 * 16 * 4cm / 10.6 * 6.3 * 1.6inPackage weight: 122g / 4.3ozPackage Listing:1 * 14-LED Bike Wheel Spoke Light1 * Bracket with Magnet Sensor