Also if anyone is wondering about processing speed this is from Spektrum's website.
While the original system adds just 5.6 milliseconds (that’s 5.6 thousandths of a second), to your radio’s own processing time, the new Pro System’s module and receiver combine to lower this already miniscule figure to a scant 3.0 milliseconds. It all adds up to lightning fast response and it’s sure to have racers feeling more connected than ever.