This works with the Nvidia Shield the Mi Box S runs Oreo like the Shield but I don't know if this would work for the Mi Box S as well? Hauppauge 1657 WinTV-dualHD Cordcutter Dual USB 2.0 TV Tuner for Nvidia Shield and Windows PC https://www.amazon.com/dp/B0787JFGWM/ref=twister_B019XIQITG?_encoding=UTF8&psc=1
Would be tempting to get if they did. Please report back if you find one that works.
Just sharing my experience, I have a Hauppauge 1191 WinTV-HVR-955Q which worked on my Nexus Player.
On my new Mi Box S it initially detected the tuner but would fail to complete the set up process - it would throw an error every time it attempted the channel scan. After additional fidgeting it got to the point where it would not even detect the tuner (the Live Channels app would disappear) and I gave up hope at that point.
I seriously doubt Any TV tuner would work on any Mi Box simply because the drivers have not been included in with the Firmware.
Drive down the road and throwing $50 bills out the window of the car would bring you better luck vs finding a compatible USB TV tuner for use on any Mi Box.
What's the best tuner for nvidia shield in the market right now plz?
Have hdhomerun works great with live channels on both shield and mibox