I cant see any mention, but mine does work (of sorts). The Realtek driver installs it and if you pump everything up to max then I can just get Cortana to recognise me without shouting. I think the mike is somewhere behind the speaker grill as I can get better results talking to that end of the device than the other. Its not brilliant – but it is there. Maybe as Cortana isnt available in China no-one panicked to get a mike working well?