Really need help, at a loss (Siberia Elite)

So I purchased a pair of Siberia Elite not too long ago, using the external soundcard Steel Series provides through the digital 7.1 sounds, friends over Skype can hear a faint clicking noise (Like a mouse click but constant) through my mic since when I mute my mic it goes, all drivers are up to date and running windows 7 64bit.

I've searched the great wide inter webs cant find anything at all so you guys are my last hope

 

Cheers in advance

 

Is it a USB sound card? If so where is it plugged in.

Edit: I see that it is USB, So where on the computer it is plugged in. Front or back, or in a PCI USB card?