Products descriptions, for me also always a huge effort when searching whether fan yes/no, if how loud? Power consumption is also rarely clearly declared. These missing features would be very helpful for my purchase decision in the switch comparison. Here, too, the technical data sheet and the generation of the switch are missing? A noisy, power-hungry device is an absolute no-go for the home office. It would be great to get a quick overview instead of having to search for 30 minutes on the manufacturer's website, usually without success, to find the motivation to buy. I now assume that a fan variant with 9-21dBr is being sold here. Where can I find the fanless 19" managed switches?