Description: 【Intelligent Solar Sensing】: Equipped with light and motion sensors, this LED wheel hub light automatically illuminates in dark environments and turns off in bright conditions. It lights up during fast rotations and change off when stationary, ensuring energy efficiency 【Bright Multi Color Effects】: LED light strip with 30 kinds of color gradients, enhances the fun and security of night riding by illuminating the wheel hub with bright colors 【Compact and Portable Design】: Measuring just 11.5 cmx7 cm/4.53 inchx2.76 inch, this lightweight Bicycle Spoke Light is easy to carry and install on bicycles. Built in high capacity lithium battery offers extended usage time. The Type C interface allows for quick charging, eliminating the need for frequent battery replacements 【Efficient Solar Charging Panel】: The polycrystalline silicon solar panel charges efficiently in any light condition, making it an ideal choice for outdoor use 【Easy Installation】: Made from ABS material, the wheel light is wear resistant, and waterproof to withstand various weather conditions and terrains. It is easy to install on multiple bike models, ensuring a secure fit that won't easily fall off during rides Specification: Material: ABS Plastic Size Chart: 11.5cmx7cm/4.53inchx2.76inch Package Includes: 1 Bike Hub Light Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.