Hard to “leak” something that was posted in 2015. It seemed more likely to just be a draft version of a device that has not been manufactured, like the Samsung sleep sensor which had a similar manual posted on the same site.
Note also that the document references “S voice” which was Samsung’s 2012 voice assistant introduced for the galaxy 5. Anything which was really new would mention Bixby.
It’s also notable that there’s no FCC information on this device. I think it most likely that this is an early version of what later became the current Samsung connect (with many fewer features, obviously). But we’ll see. 