Hello, and very much thank you for your message, I also got answer from customer support center, but not so precise as yours (4K and 20 gbps). I ordered the cable you recommended.
While waiting the cable (delivery takes about a week), do I cause any damage to the system if I test a 10 gbps cable I purchased earlier (just 5 euros) or another Hama MiniDisplay to Display-cable (4K Ultra HD, gbpd capability unknown) together with the cable that came with the glasses?
Lassi