Enjoy the benefits of command control with these sets. Command control allows you to control each locomotive individually just like the real thing! Each includes a "DCC On Board" DCC decoder-equipped locomotive, E-Z Command control center w/wall pack and simple plug-in wiring, rolling stock, E-Z Track(R) and accessories. Locos and cars come equipped with E-Z Mate(R) knuckle couplers. Locos are compatible with other DCC compliant command control systems and other decoder-equipped engines can be controlled with E-Z Command, making these sets ideal for expansion. Conventional DC locomotives and power packs cannot be used with these sets.