Questions about Godox V860II Canon

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Yes, it fits all Canon FF cameras, I have it too, it's quite good, if budget allows I would buy the GODOX V1, it can also be pointed slightly backwards, this one only maxes out at the ceiling. The V1 accessory kit is also good.

I can only confirm that it works with the Canon EOS R5. Then it should also work on the R6.

Yes, this flash is compatible with your Canon camera.

Here is all the information we have: http://www.godox.com/EN/Products_Camera_Flash_V860II.html

According to my research, you need to connect this flash to the Godox X1T-C transmitter to operate it remotely.

Yes the flash fits all current Canon DSLRs: http://www.godox.com/EN/Products_Camera_Flash_V860II.html

Not according to our information.

Compatible with the following Canon cameras: 1Dx,1Ds series, 1D series, 5D Mark III, 5DII, 5D, 6D, 7D, 70D,60D, 50D, 40D, 30D, 20D, 650D, 600D, 550D, 500D, 450D, 400D, 350D, 1100D, 1000D. Should also be compatible with the 760D in my opinion. Is also compatible with the 5D Mark IV.

Thank you very much for pointing this out. I have forwarded it for amendment and this will be checked as soon as possible.

According to my own research, this flash is unfortunately not compatible with the 4000D. Mains operation is unfortunately not possible, sorry.