This is the DABBoard, just improved and equipped with the Si4688.
The Si4688 offers HD Radio reception for the US.
It has all of the features of the Si4684, used for the standard DABBoard, but with extra FMHD reception.
Please see Silicon Labs Si468x
Follow the description as given for the standard DABBoard:
uGreen DAB Board
We have only a very limited number of boards with the Si4688 – so please only order this if you really need that feature.