Products with alpha keying capability?

Can someone clarify what hardware keying capabilities the following product have?

UltraStudio 3D: HD external keying (key/fill) and internal DSK supported
UltraStudio Express: ??
UltraStudio 4K: ??

Decklink HD Extreme 3D: HD external keying (key/fill) and internal DSK supported
Decklink 4K Extreme: ??
Decklink Studio: SD external keying (key/fill) and internal DSK supported

Also, do any other Blackmagic USB or Thunderbolt devices have keying capability?

Thanks.