Discover The Acer Mixed Reality 3D Headset
The Acer AH101-D8EY Windows Mixed Reality 3D Headset and 2 Wireless Controller is available on line now for less than $500. It offers a dual screen 3D stereoscopic resolution of 1,440x1,440 pixels per eye and the images refresh 90 times per second. The two controllers include gyroscopes, magnetometers, and accelerometers for gesture recognition and there is B/W tracking camera. Windows 10 highly recommended!
Acer Mixed Reality Explained

Connectors and Adapters
WMR headsets connect to your PC via HDMI and USB-A 3.0, while the motion controllers use Bluetooth 4.0. Unfortunately, not all PCs have what it takes to connect, so adapters (often called dongles) are required. The adapter market is huge, and buying the first thing you see might not always turn out great. Windows central put together this guide to help you get the right connection.
Source: WindowsCentral.