1) Powerful Mainboard: Me Auriga mainboard developed based on open-source Arduino mega 2560. It provides not only five on-board sensors, but also 10 extension ports that enable you to add more functions per needed. 2) 6 integrated sensors for expanded functionality: Light sensor, Ultrasonic sensor, Line follower, Gyroscope, Temp sensor, Sound sensor, which make robots more versatile. The sensor enable the robot to perform advanced functionality including avoiding obstacles, following lines, keep its balance, and more. 3) Limitless extensions: Equipped with 10 extension interfaces for connecting 40+ types of electronic modules (12 included in the kit), and compatible with the Makeblock platform and LEGO blocks, mBot Ranger will bring you limitless fun. 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.