Hi @Mike_Calodoucas,
I see this device for the first time and have no idea if it works with Roon.
@Klaus_Engel and me we are currently working at at firmware for this knob with a screen device to run with Roon. It is a really nice device, full machined metal case and a crystal clear high resolution display.
It can connect to WiFi so no more trouble with BT coverage or separate BT antennas. You can use it in your complete WiFi Zone. A prototype is up and running but still with a lot of bugs 
Here some first impressions of the display capabilities 
Best DrCWO