DC Transformers: HO, N Scale
AC Transformers: O, G (2/3 O Rail, G Scale), HO 3 Rail European
DCC (Digital Command Control): In DCC systems radio signals are sent from a hand held or stationary device which converts the radio signals to digital information that is sent through the rails and picked up by a receiver in a locomotive. DCC is a system which allows independent operation of various locomotives. This system allows multiple locomotives to run at varying speeds and direction at the same time and on the same track.