agm mastech slot car set with racing assistant app no.asr-02 1:43 scale agm mastech <ul><li>this slot car set is able to connect with smart devices and uses an app to enhance the racing experiences. the app shows your real-time racing data. while you are racing, it also has voice commentary and racing sound effects. you can share your contest results to social networks. * the app is free in apple store and android market. </li><li>the track is 8 meters / 26.2ft long. </li><li>cars: mercedes benz sls amg models in 1:43 scale. </li><li>set includes: asr control box with built-in bluetooth, track pieces, controller*2, cars*2, transformer, and other accessories.</li></ul>