here are the specifications for XTAL 3, according to Vrgineers:

Displays: 3840×2160 per eye fast-switch LCD
Refresh Rate: 75Hz at 4K or 120Hz at 1440p
Field of View: 180° horizontal × 90° vertical
Weight: 600 grams without head strap
Eye Tracking with foveated rendering and automatic IPD adjustment
Platform: SteamVR or OpenXR

10k !