I think it's dc. It's the standard controller that came with the train set. I tried to locos but didn't seem like it had enough power. 

I'm new to the train world I have 2 ho train sets. My question is can I run them on the same track with the power supply they come with doesn't give them much speed. Do I need a bigger power pack? Which one? Or is it not possible to run them both on the same track? I'm using easy track. Thanks for your help