Fast & Easy Installation - IPX5 WaterproofInstall without any tools required. Suitable for bicycles with spokes ranging from 16 inches to 29 inches. (Refer to the video or images for installation steps.) - These wheel lights are waterproof, allowing worry-free riding in rainy weather.Battery-Powered - Up to 100 HoursThese battery-powered LED Bike Spoke Lights use included 2032 batteries, offering up to 100 hours of continuous illumination. When the batteries run out, easily replace them with new ones.Perfect Gift for Your FriendOur super cool bike lights are ideal for gifting, and they come with long-lasting batteries included. They are highly sought-after Christmas presents and perfect little gifts for birthdays. Suitable for men, women, girls, and boys, year-round.4-Pack - Color Bike Light:3 light modes: Quick Flash-(Only white) > Slow flash (Only white) > Color morphing (RGB). With 260 lumens of brightness, it ensures visibility to rear pedestrians and surrounding vehicles.4-Pack - 360 All-Around VisibilityOur bicycle wheel lights provide 360-degree visibility, ensuring your safety from all directions and making you stand out during travel or night rides.