[WindowsCentral.com]

Picked up some Motion Controllers separately to your Mixed Reality headset? Here's how to get started.
You don't need the Motion Controllers to have an experience with Windows Mixed Reality, but you do if you want the best experience. Initially, availability of controllers separate to headsets is a little lacking, though can be found from places like Dell's online store.
In any case, if you picked up a headset without them and invest in some down the line, you'll need to get them connected first before you do anything. Fortunately, it's really easy.

Full story from the WindowsCentral blog...