What are the specs? Maximum current? Filtered or unfiltered DC output? Never mind - the web page has specs.
So it is a pulsed DC output (using half-wave rectifier?). Not very DCC-friendly (yes, I understand that it is a DC throttle, but many locos nowadays come with decoders factory-installed).
I'm also surprised that this little throttle without a heat sink on the power transistor can handle 2A of current without overheating.