Headset Integrated Headphones Tether with DisplayPort 1.2 and USB 3.0 Connections Power Adapter Regionalized Power Adapter Plug(s) 2 Face Gaskets (narrow and wide)That page also listed the release date for June 15th. Valve has since confirmed the final date hasn't been finalized it, but the VR headset will indeed be out in June. Pre-order information and specifications will be released on May 1st.
This is, in all likelihood, the VR headset Valve has been preparing for a while. UploadVR managed to grab a few leaked images of the prototype back in November, adding that the Field of View (FoV) will be 135 degrees and the resolution will be similar to the HTC Vive Pro (1440x1600 resolution per eye, then). Chances are the Valve Index will come bundled with the Knuckles SteamVR motion controller as well as some games, possibly even a version of Half-Life designed for Virtual Reality.
Last but not least, SteamDB spotted a logo for Valve Index in the EUIPO (European Union Intellectual Property Office) database a couple of months ago.
That's about all we currently know on the device, but it's still enough to raise our interest in the upcoming reveal. What would you like to see from Valve? Tell us in the comments!