What can you hear through the Studio 1824 Headphones out?

I want to purchase a Studio 1824 however I want to be clear about the features of the unit so I don't run into the same issue I am having with my current mini ********* umc22 Interface which is only acting as a monitor output because it has a pair of balanced main outputs ruing to my E5s.

What I want to be certain of is whether or not I can listen to my computer audio through the headphone outs of the Studio 1824, which should be the case but I want to be 10000% certain. Also I want to know whether it is possible to only get audio from the headphone outs of the interface and mute the mains so that I don't have to switch off my E5s every time I want to switch to my headphones.

The current little ********* umc22 interface only has one output volume knob and that controls the output for everything including headphones.

*EDIT: I have found a workaround that I totally forgot about with stereo mix, however I sometimes use stereo mix to broadcast music through my teamspeak chael so I am still looking for the answer to my original question.