Thanks to MocciJ in Comments for the tip.
And here we go again …
Claiming Windows 8.1:
But now we know that there will be a separate model with Windows pre-installed. Because Teclast just listed a Windows-only X89HD.
Although this could be a competitor to the Onda V975w, we don’t yet have reviews or user reports of either.
Note that the X98 Air lacks GPS.