From the description it seems to have an induction motor so it should be pretty quiet. In the photos neither guy is wearing hearing protection.
Not wearing any dust protection either. Is there some kind of dust collection ability?
Not mine personally, but the shop where I used to work, has 2 of them. They are used for finish sanding/polishing of solid surface countertops.
They are indeed near-total silent. There is a bit of a vibration sound, if the item you are sanding is not very solidly supported, but the motor is very quiet. It has a very large orbit 5/8" (16mm)
It runs at a fairly slow RPM, but the sheer size of the abrasive pad means pretty decent surface speed at the point of contact. Because of the momentum of the spinning head, it takes several seconds for it to come to a stop.
One of the machines is about 6 years old and the other 3 or 4? and in all that time, the only issues we ever had was with one of the cords. However, that was abuse, not the fault of the unit at all.
There is no dust collect/extraction, but as comparatively slow as it runs, it is not thrown wildly. A simple damp rag between grit changes is usually adequate.
Klingspor also sells the abrasive disks for them, not exactly a local home center item.
I would guess that's why they are a distributor too.