Basically, the keyboard is recognised by Linux. The function and multimedia keys may not work, as well as the backlight adjustment. Because Razer doesn't offer drivers for Linux, you could check out the "OpenRazer" software.

This product can be connected via wireless 2,4 Ghz, Bluetooth or USB-C.

The keyboard has a USB C cable that you can detach. Under the keyboard is a small compartment with a Bluetooth USB plug that you can remove and also connect to the PC. On the left side of the keyboard there is a switch where you can switch between the modes if you want to be connected via cable or Bluetooth. I often use this myself with the cable on the PC and the Bluetooth plug on the laptop and switch back and forth in between.

Look closely at the picture😉

Unfortunately not, I'm sorry.

The keyboards have different layouts. Vergleich: https://www.galaxus.ch/Comparison/13955289-13993310-13993306

If they dont have enough informations for you, go on to the Razer Website... The Link for the Razer site: https://www.razer.com/gaming-keyboards/razer-blackwidow-v3-pro/RZ03-03530200-R3U1