It’s not clear, and the video release, as others have mentioned says it works out of the box. Which it clearly doesn’t as it doesn’t come with a DCC decoder even to work on DCC. Says link with a DCC sound decoder for the sound, doesn’t say needs it for the steam. Says if you want to add the sound. (Which I don’t) and the triang steam 040 works perfectly fine without DCC, I know it’s ancient, but there are other steam generators available without DCC, as you @96RAF have advised me of previously. So it could be much clearer.