Microsoft's motion-sensing controllers for Xbox 360 videogame consoles made their entry before an invitation-only audience in a Los Angeles theater.
Technology developed by Microsoft under the code name Project Natal was re-christened "Kinect."
No price details were disclosed at the presentation, which provided glimpses at how Kinect lets players control on-screen characters with natural gestures instead of hand-held controllers.
More information about Kinect and game software made for the device will be revealed at a press conference scheduled for Monday on the eve of the opening of a major Electronic Entertainment Expo (E3) here.
Kinect uses a 3-D camera and gesture recognition software to let people play videogames using natural body movements instead of hand-held controllers.
Kinect lets people play driving games, for example, by simply moving their hands as if turning a car steering wheel.
On-screen figures in sports or dance titles mimic the body movements of people in the real-world.