On Walmart.com where you can now get these
Nintendo Joy-Cons in Grey for just $69.99 shipped (regularly $79.99)!

You can use these two Joy-Con controllers independently in each hand, or together as one game controller when attached to the Joy-Con grip – which is sold separately. Each Joy-Con has a full set of buttons, can act as a standalone controller, and includes an accelerometer and gyro-sensor, making independent left and right motion control possible.