Hog 4 PC supports up to 12 universes with corresponding hardware output.
The Single Widget unlocks 1 universe
The Super Widget unlocks 4 universes
The Super Duper Widget unlocks 8 universes
These can stack up to 12 universes total
There is also the Nomad License, which is an ETC product that also unlocks Hog 4 PC as of 3.12.0
The Base Nomad License unlocks 2 universes
The Unlocked Nomad Licence unlocks 12 universes
THESE DO NOT STACK
In combination with the nomad, a Gadget II can be used to get 5-pin DMX output, The Gadget II does not do anything without a nomad license.
All of the above only applies to Hog 4 PC
For more information check out this video
Or this article