Speaker/Microphone Headset Question

If I plug my headset into my speakers the microphone will not work.

Is there a set of speakers with USB plug that has a place for microphone ?

Or is there an extension wire available so that I can plug my headset into the
speakers that I have and extend the microphone to my pc ?

Thanks in Advance !

This is the one we’ve been using. It takes a computer microphone (it supplies the 6 volts) and a stereo headset.

http://www.startech.com/item/ICUSBAUDIO-USB-20-to-Audio-Adapter.aspx

Koz