The triangular shape design is adopted, and the advantages of triangular multi-faceted shape are integrated into the function, so that the three light belts can illuminate more angles on different surfaces, improve the probability of passive reminding and increase the safety of riding at night. Combined with the camera function, it can record the scenery of riding in real time and share it to social media, and it can also provide video evidence when dealing with emergencies. The RGB light ring design can adjust the same color mode or flashing frequency during team riding to increase the consistency and atmosphere of the team. (Easter egg function: it can also be used as an atmosphere light at night. Pin-in and take photos to create an atmosphere for light filling)