Acer Windows Mixed Reality Headset, with motion controllers.  I got this on Amazon some time ago to test out for use in my Virtual Reality Arcade.  It works as advertised - You can play Minecraft in VR, and it's amazing.  However we have since decided to use other hardware (samsung Odyssey) so I have to sell this very nice piece of kit.  Only used for 4 hours, most of it trying to set up and play Minecraft 10.  Actual unit is pictured.