This board replaces the existing internal RF board in your Horus X12S, X10 or X10S. It adds the ability to run in either ACCESS or ACCST D16 mode. It will require an additional antenna for the X10 radios, do not use it with out an antenna attached to each of the 3 antenna locations.
Specialized firmware will need to be installed onto your radio after installation.
Also will allow these radios to run Frsky's newest Ethos firmware when it is publicly released.