XuanWheel X1 APP Customizable Rechargeable Bicycle LED Light for 26-Inch Wheel The world's first mobile phone to support the control of Bluetooth and Bluetooth 4.0 wireless intelligent bicycle light. With a simple and quick installation, the wheel turns your bicycle wheel into a colorful display. Xuanwheel mobile phone APP support DIY function, any you want to show the pattern or moving picture can be edited on the phone APP and delivered to the wheel through the Bluetooth wheel. Even more surprising is that Hyun wheel can accurately record your riding data, wake up your passion for sports!