The UPG1 is an upgraded Ethernet module that allows older controllers
such as the E680 and E681 to run the latest firmware.
If your E680 or E681 has the red rectangular Ethernet module, that is
the old style module, and you are limited to firmware version 2.
Replacing that module with a UPG1 will allow your board to control up
to 12 universes (2,040 pixels) and run the latest firmware.
Contact SanDevices for the proper firmware file.