So the manual says the board is a Protosound DCRU or rather it has Digital Control Reverse Unit in addition to sound and whistle functions. The manual has no publication date and the box has no date on it either the model number is 30-1119-0. There is a QSI tag on the board as you can see in the photo. When I place the loco on the track there is no sound except for clicking when I start it. I have a Lionel Trainmaster transformer.