Originally just shipping with Windows 10. Teclast has now released the X98 Plus (recently reviewed) in dual boot configuration. The X98 Plus Dual OS is now selling on JD.com for 1099 yuan in China which is about $170 USD. Banggood.com have it listed for $200, but it’s not in stock yet.
And the X80 Plus with Android and Windows is coming very soon. I have my X80 Plus Windows 10 model ordered and I’m waiting for its arrival hopefully in a week or two.