-bmusb is a free driver for BlackMagic's Intensity Shuttle USB3 card,
-which has no official Linux driver. It runs in userspace through usbfs,
-which may mean it could also probably run on FreeBSD, but it's untested.
+bmusb is a free driver for BlackMagic's Intensity Shuttle and
+UltraStudio SDI USB3 cards, which have no official Linux driver.
+(The two seem to speak exactly the same protocol.) It runs in userspace
+through usbfs, which may mean it could also probably run on FreeBSD,
+but it's untested.