Microsoft have officially ceased production of the Xbox One Kinect adapter. This adapter was used for those who wished to use their Kinect after upgrading to the Xbox One S from the original Xbox One.
The product was originally free provided you sent the serial numbers to both consoles to Microsoft. If you did not qualify, you would have to shell out $39.99.
In this article:Kinect, Microsoft, Xbox One, Xbox One Kinect Adapter