Fans for Entertainment centre.

I recently moved my xbox 360 to a closed space in my entertainment center and I have noticed that the air inside becomes really hot after a while. I plan on installing a couple of 120mm fans inside like this one

http://www.flipkart.com/cooler-master-bc-120-mm-green-l...

What I need is an adapter for this, so that I can plug it into my power outlet. Doesn't have to be automated or anything like that. Will just turn it on when I use my xbox, so all I need is the adapter. I don't know what to search for so please help me out! Thanks  

Saaketh