Please follow the instructions on the HTC VIVE Focus 3 support page to cast your headset screen to a web browser.
How to enable and use Miracast on Windows 10:
1. Right-click on the Start menu
2. Search for "projecting to this PC"
3. Check if your settings are the same as in the picture
4. Now search for "connect app" in the Start menu
5. Click on the app
6. You'll get a message about your computer being ready for you to connect
7. Put on the headset
8. Select "cast"
9. Choose your PC in the list of available devices
The battery time for HTC VIVE Focus 3 headset is 2 hours on full charge with normal usage. Use enclosed cables to charge.
1. Power off device completely
2. Hold the "volume down" and "power" buttons to power up (release after seeing the HTC VIVE Focus 3 logo)
3. Use the "volume down" button to locate "factory reset" in the menu
4. Use the headset button to select it
If you don't see the "non-installed/installed apps" make sure that you are logged in to the headset. Log in by clicking on profile.
First, make sure they are fully charged. If they are asleep, shaking them gently should wake them up. If your controllers are off, turn them on by pressing the VIVE and Menu buttons on each controller briefly.