Video Capture

I have a cople questions about my capture card and what it does or can do,im not sure what kind it is but is has two plugs on the back and one of them says "FM" on it and the other is "remote" and on my mother bord (ive been wondering about this for the past year)I have a plug that says on it
"S/PDIF out" any help on that.

Thank you in advance:smile: