You can run your BlueLine and Paragon2 engines right out of the box. You will hear start up sounds, brakes, chuff etc. DC users will not be able to activate the horn or bell/whistle without the DC Master. You can also adjust many features of the BlueLine and Paragon2 Series engines with the DC Master. For DC users it is a one time purchase and will work with all the BlueLine and Paragon2 engines on the market.