Conclusion:
Microsoft Natural Keyboard Egonomic 4000 also works with special key assignment after switching.
Mouse trackball from Logitec M570 Bluetooth - contrary to the description of the switch it works.
The Benq monitor "Senseye" (type ID: GL2450-T) will be addressed each with 1920x1080.
The change lasts about 4 seconds.
Overall impression: For this price a really genuine recommendation on my part. Should not change what I'll readjust this assessment.
What does not work (but has nothing to do with the switch-ability):
When switching everything is shifted from the desktop extension the notebook on the primary notebook monitor. When switching back so that the extended monitor is blank.
