The edelkrone app will allow you to pair one Head, along with either one Slider, Dolly, or Jib at the same time.
The only exception is the HeadONE, which will allow you to pair one HeadONE for Pan, and one HeadONE for Tilt simultaneously with one Slider/Dolly/ or Jib.
If you plan on using more than one Head and Slider/Dolly/Jib combination, you will need a separate device for each setup.