1) It is not original and 2) is NOT a sound card! It is a RailBoss 4 Plus R/C card with 3) a battery conversion module made by Del at
www.gscalegraphics.net. Part of it is missing. There should be a green circuit board that goes across the two black multipin connectors at the top of the board in the first picture. Send Del a picture at
GScaleGraphics@comcast.net and he'll tell you the exact model you have (it looks older than the current version) and if the missing part is available. You also will need to buy one of the remotes unless you can find it tucked away somewhere in the car. His website has wiring diagrams and manuals to download and they are quite informative. He does sell the MyLocoSound cards with instructions on hooking them up to the RailBoss 4. I have pretty much standardized on these R/C units and if you decide to sell it rather than fix and use it, I'd be interested.