Compatible Models (Current 2021.1.21) Rear View Radar with Built in Tail Light RTL515(010-02379-00) (010-02376-00) RTL510(010-01975-00) (010-01980-00) RTL500(010-01509-04) (010-01509-00) TL300 (010-01417-00) Varia Rearview Radar RVR315 (010-02252-00) (010-02255-01) Varia Radar Tail Light RTL515 (010-02376-00) (010-02379-00) Specifications and expansion parts, product description and compatibility information cannot be explaned on Amazon by limiting characters or expressions. Please see the product detail page on the manufacturer website for your purchase. Common Notes Specifications, design, accessories, accessories, warnings, etc. may change without prior notice. There may be cases where the mount, parts, saddle, and saddlebags are installed to interfere with the mount, parts. Please check the interference of the parts you plan to install before purchasing. We are unsure about the load capacity and recommended load capacity of the saddle screw holes (dowel holes) so please contact the agent of each brand. We do not answer any questions about each size. Please check the dimensions with each brand agency. Some cases have different models of the same name. Please check the shape of the hole before purchasing. Image is for illustration purposes only. Other accessories are not included. No tools are included. Some images are a prototype, and the design may differ from the product sold together. On this page is a mount adapter page for the Saddle, Seatpost, Safety Light, Mud Flaps, Biken, etc. Please do not install a cycling computer with this product. This product can be removed if you hold it securely in both hands. PS: 2022.6.1 Not Compatible with Varia RCT715 (Varia Earl City715) (Item # 010-02478-00)