It is cc/cv
sMAW & GTAW are CC
GMAW & FCAW are CV
If you get the advanced feeder it will gun GMAWP which is both CC and CV
If you have the dial on the face of the power supply set for CV mig that is what you will get :)
Match your feeder to the power supply always.
PS. Miller website has owners manuals for everything for free. They might explain better than I did