Changes

It comes with a control box. It has an [[Ascension]] spacepad tracker integrated into the headset.<ref name="YouTube 2024 e890">{{cite web | title=Virtual Research VR-4 HMD Teardown Part 1 | website=YouTube | date=March 6, 2024 | url=https://www.youtube.com/watch?v=rdt4yyUvzAo | access-date=May 1, 2024}}</ref>

It comes with a control box. It has an [[Ascension]] spacepad tracker integrated into the headset.<ref name="YouTube 2024 e890">{{cite web | title=Virtual Research VR-4 HMD Teardown Part 1 | website=YouTube | date=March 6, 2024 | url=https://www.youtube.com/watch?v=rdt4yyUvzAo | access-date=May 1, 2024}}</ref>

It was introduced in May 1994.<ref name="s327">{{cite web | title=VR-4 Manual | url=https://vrtifacts.com/wp-content/uploads/filebase/VR-4%20Manual.pdf | access-date=2024-05-21}}</ref><ref name="p926">{{cite web | title= | url=https://web.archive.org/web/20190203183657if_/http://www.virtualresearch.com:80/Acrobat_files/VR_VR4man.pdf | access-date=2024-05-21}}</ref>

It was introduced in May 1994.<ref name="s327">{{cite web | title=VR-4 Manual | url=https://vrtifacts.com/wp-content/uploads/filebase/VR-4%20Manual.pdf | access-date=2024-05-21}}</ref><ref name="p926">{{cite web | title= VR4 User's Guide | url=https://web.archive.org/web/20190203183657if_/http://www.virtualresearch.com/Acrobat_files/VR_VR4man.pdf | access-date=2024-05-21}}</ref>