Questions about Ubiquiti UniFi US-XG-6POE

My XG-6 is in the living room and I find it quite loud. It sounds like there is a fan inside. Can other owners confirm this?

What do the 2 console [Ethernet and USB] ports do? I mean can I use them for something useful?

Do I understand that correctly? This switch can handle 10GbE AND PoE+ at the same time? That would probably make more sense than getting an 8 PoE Enterprise Switch because it only gives out 2.5GbE PoE+, right? The few francs difference are spec wise not big I guess.

Can the switch also handle 100 MBits end devices? I can find different information on this, so I wonder if anyone can confirm this. Thanks

According to Digitec it has 802.3af (PoE) ? Is that correct? Or does the switch have 802.bt (PoE++)? Does it need the Cloud Key and Dream Machine? Thanks in advance for helpful answers.

Can the switch automatically set the speed for the 4 RJ45 ports? Can it do 1Gbit/s and 10Gbit/s or can it do 2.5Gbit/s and 5Gbit/s? Or can it only do 10Gbit/s?

Can the switch be mounted in a rack? Or are parts supplied for this purpose?

The performance data of the switch meet my needs. But: It is not obvious when the switch is how loud. Please ask the manufacturer for the following independently confirmed measured values: Noise level at 20°C and "no traffic load at all" : ___ dB(A) Noise Level at 20°C and "25% / 50% 75% 95% traffic load": ___ / ___ / ___ / ___ dB(A) Noise Level at 30°C and "no traffic load at all" : ___ dB(A) Noise Level at 30°C and "25% / 50% 75% 95% traffic load": ___ / ___ / ___ / ___ dB(A) Noise Level at 40°C and "no traffic load at all" : ___ dB(A) Noise Level at 40°C and "25% / 50% 75% 95% traffic load": ___ / ___ / ___ / ___ dB(A) Merci muchmals.

Is this product supplied with the CH power plug?