This package includes 2 packs of rechargeable bike spoke and wheel lights. They are weatherproof for outdoor use in different light rain conditions. Equipped with 7-color variable light effect and motion sensor function, they automatically activate when the wheel moves. Designed to fit all wheel sizes, they work for balance bikes for kids and toddlers, adult bicycles and e-bikes. Easy to install on wheel spokes, they enhance cycling visibility at night, improve riding safety, and are suitable for daily commuting, night riding and kids outdoor cycling activities.