So, virtual power is an estimation of your actual power based on your speed and the position of the handlebar lever. For other languages go to: support.tacx.com > manuals > trainers Example graph, Blue Matic T2650.
Page 2
Compatible with: Compatible with Tablet/Smartphone with Bluetooth® 4 or higher - Tacx Training app (smartphone) Android tablet with ANT+ - Tacx Cycling app (tablet) Desktop with ANT+ antenna - Zwift app (tablet)