Going racing? Most likely you'll need a transponder. Save on rental fees and buy your own. This TR2 was used for only one race before I got hurt at work and cannot race anymore. It is tested and works perfectly. It has the current updates and is unregistered so you can add it to your Speedhive account, subscribe, and go! Includes charger, cable, and manual. No mount is included, but they're readily available in several styles based on your type of racing. I used it on a dirt oval but it can be used with virtually any type of racing you may do. On the Speedhive app you can even track your lap times! A must have if you're racing. Ships free!