It has an AC (not DC) output.
Hornby R.965 Single Track Controller & Hornby C912 Transformer
Hornby C912 Transformer Power Adapter
Hornby C912 Transformer En 61558 230v 50hz Sec 16v 13va Ip40 FREE UKPOSTAGE
HORNBY C912 Transformer 230V 16V-13VA IP40 Model Railway Train Power Supply
hornby C912 Transformer
Hornby C912 Transformer M3603
