Cool! I wonder why it isn't being marketed on the cardosystems.com website which is where I looked.
Here in the U.S. I shop Amazon and Revzilla. On Amazon, there is a Packtalk Edge dual pack but not "Duo". There is a "Duo" on Revzilla but there I found this:
"Note: The Edge has limited compatibility with older Cardo units. If you join a non Edge group, the group will be deleted and you will be made leader."
Cardo claims that the Packtalk Bold was wildly popular yet makes its replacement incompatible. That just seems hard to believe. It sure discourages me from considering upgrading since a number of riders in the group I occasionally ride with own older Cardo units.
