Developed over the last 30 years Digital Command Control (DCC) uses a powerful micro-processor signal decoder to drive each locomotive. A control unit instructs the locomotive to move, forward, backwards, faster or slower independantly of any other locomotive on your railways. Just like the driver of a  real train. Better that the driver of a real train you can drive more than one train, along the same tracks if you like!
But that's not all the decoder can do! While even the basic decoders can switch on  diesel locomotive lights at full brightness all of the time Bachmann have produced realistic locomotive sound using recordings from real locomotives! Ladies and Gentlemen!  Start your engines!

To ensure different manufacturers DCC equipment will work together  standards are maintained by the National Model Railroad Association (USA).  The terms NMRA standard, NMRA plug, etc. are commonly found on DCC equipment,  a guarantee that the electronics conform to and will work with all other NMRA standard compliant equipment.