Here's the information from the SoundTraxx web site -- this should answer all of your questions about their decoder.
http://www.soundtraxx.com/dsd/tsunami/1000gn.php
Hello to all,
I have 2 Genesis Fp45's with the Mrc sound decoders in them. I would like to know if the Mrc sound decoder can be replaced with the Tsu Gn1000 Emd 645 Turbo decoder? The Mrc decoder has some some additional functions to it, like the engine is set up to have the mars light and also has the red flashing emergency mars light. What I'm asking here is can I make this swap of decoders and still get the same functions like the 2 type lights I mentioned? Has anyone ever done this and if so could you give me some help or tips or information on where I could find out how to do this?
Railcon44