The subjects of electro-pneumatics and vacuum technology are demonstrated clearly with the aid of fascinating models such as the pneumatic motor, color sorting robot for colored parts, ball obstacle course and pinball machine. The compact and powerful fischertechnik compressor guarantees that you have a reliable and consistent supply of compressed air to the models. The electro-magnetic valves included allow remote control of the models with a PC. Contains 440 components (including compressor, miniature motor, 2x solenoid valves, optical color sensor, vacuum, exhauster, 3x cylinders with spring, 2x photo-transistors, 2x lens tip lamps, and 11 flex-rails) to build 4 functional models: Compressed Air Motor, Color Sorting Robot, Pinball Machine, Ball Obstacle Course. PLEASE NOTE: This set REQUIRES either the ROBOTICS TXT Controller (17073), ROBO Pro Software (17074), and either the fischertechnik Accu Set (17061) or Power Set (17060) (each sold separately). Also includes related instructional material on CD. Comes packed in sturdy plastic Gratnell's storage box. Recommended: 1 set per 2 students.