Rod,
On the website linked above for PowerFlarm it gives tech specs as
•868MHz FLARM transceiver with extended range
•supports dual antenna operation (optional)
•1090 MHz receiver for Mode-C/S and ADS-B
•very high range (>100 NM)
•data output on ground possible (e.g. to optional PC-Software)
So hopefully that isn't just a typo, and it combines mode C & S as well as ADS-B.....still missing mode A though.