What headphone jack is this? Yamaha dx530 Keyboard?

So I've been using this wonderful piano for the past little while and I've really been wanting to you know... get immersed into my own little world of music with headphones, however I need the right ones... Of course normal earbuds don't work it has to be those crazy... "Professional" headphones with the right jack. Yes I know the bigger jack gives much better quality yadda yadda haha. Anyways My question is.. what is the Headphone jack? It's just the simple universal one, it's the size for a large speaker to be plugged into. I just want the name so that I can either buy headphones or buy an adapter to be able to plug in my nice noise cancelling ones into it. Thanks!