The iRobot Create and Command Package combines an iRobot Create Programmable Robot with a Command Module for complete autonomous control. The Command Module is an 8-bit, 18MHz microcontroller enabling full programmability of the Create's motors, lights, sounds and sensor readings. The Module plugs into the robot's cargo bay connector for on-board control via programs you write in C. It has four DB-9 expansion ports for adding your own hardware.