The Anki Overdrive Starter Kit is a slotless race car set that you can control and discharge weapons from a mobile app on your phone. The starter kit comes with everything you need to get started, including two cars, a special race track, charging stations, and a tire cleaner. The cars are self-aware robots that are driven by artificial intelligence and equipped with deadly strategy. They can learn any track you build and will hunt you down wherever you drive. The better you play, the better the cars become. You can customize weapons, swap out cars, and build new tracks. Set up is easy, simply open the Starter Kit and build your battle track. The Overdrive app automatically handles everything else, from getting you connected, to teaching you gameplay, so you can start playing immediately. - Used Like New. Used once after purchased. Lots of fun setting it up for resale, though. - Lightweight tracks that connect by magnetism. Can be used on most surfaces. - The free app is no longer available but can be downloaded at the App Store for each phone that is being used for a one time $2.99 fee. I downloaded it myself to make sure everything works fine and they even have updates within the app. It worked perfect! ACCEPTING BEST OFFER