OnePlus released the US$159 OnePlus Watch a while ago. Sadly, though, the watch looks set to be a colossal flop, with reviews consistently panning it for its inability to be good at being, well, a smartwatch at the very least.
https://www.notebookcheck.net/Early-reviews-of-the-OnePlus-Watch-show-overwhelming-disappointment-at-OnePlus-debut-smartwatch.532715.0.html