This is a product for business contractors. You can learn sequence control technologies that are essential for developing immediate combat skills that are useful in manufacturing sites. Comes with a CD containing all page color text (.pdf). Step up from simple challenges to challenging advanced challenges so you can progress with effortless and fun. Specifications: Sequence practice kit mini; Set Contents: All-page color text (CD-ROM); Assembly kit (substrate 6.3 x 6.1 inches (160 x 155 mm); Motor unit (DC motor, gearbox); AC adapter, wire set; *Solder set (soldering iron, solder), Phillips screwdriver, flathead screwdriver, nipper, cutter, and stripper are required for use.