1) One Kit, Two Robots: Build a Robot Tank or a Three-Wheeled Robot Car with this kit - Aluminum extrusion structure. 2) Support Scratch & Arduino Programming: Learning programming is way more fun when your code controls a robot. Based around an Arduino board, this kit will teach you all about programming a micro-controller board to control physical objects using sensors. 3) Two versions: Bluetooth Version and Infrared Receiver Version. Bluetooth Version for families and individuals: Support PC device, Mobile Device(Apple and Android device); Infrared Receiver Version for educators: Support PC device and the IR remote controller, Not Support Mobile Device. 4) REMARK: Makeblock is the manufacture for all Makeblock product and also the owner for Makeblock trademark. We provide 24 hours technical support. Please recognize the brand owner as Makeblock. Otherwise we are unable to provide after-sales service if it is from non-authorized sellers. 5) Amazon-EU Online Store: Makeblock UK, Makeblock DE, Makeblock FR, Makeblock IT, Makeblock ES.