The SparkFun RedBot Basic Kit includes an all-in-one mainboard and sensor package to build a functional, programmable robot on a chassis.RedBot Mainboard: Combines an Arduino-compatible microcontroller with a built-in motor driver, removing the need to stack multiple shields.Chassis: Uses a shadow/magician-style mechanical chassis with rubber-tired wheels and 140 RPM hobby gearmotors.Sensors: Comes with an accelerometer for bump/motion detection and three line-follower infrared sensors.