How can I set up my Go groove Airband wireless headset to use with itunes, online movies etc?

I have a new Gogroove Wireless Airband headset. i can't seeem to get it to pair with itunes and I also need to use it to watch movies and listen to downloaded music on my MacMini. the sound is still cming through my speakers and I will use them occasionally, but want to be able to use both easily. Can anyone assist me?

I am not very proficient with lectronics I'm afraid, but can follow directions if they are not too technically spoken.

Thanks