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HoloLens 2 is an augmented reality/mixed reality headset. It cannot be used as a virtual reality device and does not support SteamVR.
Also, the HoloLens tag is specifically for technical questions about developing applications for HoloLens. HoloLens device support is not currently available on Q&A. For questions about using your device please check out the documentation and support options at https://docs.microsoft.com/hololens.
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