What will I need for Kinect to work on my Xbox 360?

I bought my Xbox 360 a month and a half ago, but it is just an Xbox Arcade. I know it is the version where they moved the processor or whatever was overheating and causing the 3 Red Rings. I heard these 360s will be able to use Kinect ...

var:http://www.epicfailgamer.com/questions/xbox360/kinect/what-will-i-need-for-kinect-to-work-on-my-xbox-360/