Is this case fan an intake or exhaust? + How do I remove/unmount it?

[LookingforanIDA7license]

Image in the attachment area.

Is this fan pointing inwards or outwards/intake or exhaust?

 

If its an intake, how I do unmount it (red circles)? 

Pulling and rotating the (red circles) nobs don't change a thing.

Bought this case fan a long time ago but if I had to make a guess, I would def. say it's a Silent wing 3 120mm. Actually that might even be it.

EDIT: I just noticed that I can move the fan up and down a bit, if that's relevant. There are no screws on the back side, just semisphere-shaped caps/nobs(?).

[Fasauceome]

You can tell by the way the fan blades are cupped, it's blowing air out of the case. I haven't seen that particular design for a silent wings fan, but it looks like a slender object can push the back of those plastic tubes and clear the fixture.

 

Given the apparent one-way design of the mount, I would look at this as a pretty good option for a CPU cooler's second fan or an exhaust fan, but it wouldn't serve as an intake fan very well.