Top unit for a Macbook Air

Use the monitor for my Macbook Air and it works flawlessly. No stuttering, artifacts or disconnections.
The monitor is connected with me via DisplayPort. The sound works perfectly on the port, very rarely the audio output is not detected correctly. In contrast, a short off and log back helps.
The USB Hub I have a wireless mouse / keyboard from Logitech connected. Bringing the notebook can wake up from sleep.
Qualm USB Hub is that fiddly plug the USB devices. With a little practice, however, it goes without problems. I use a small extension cord.