Which US Apple Store iPad Pro supports mmWave?

I can't seem to find in the store listings the specific option that includdes mmwave - it seems that iPad Pro + Cellular has both that and +mmWave - which is the exact product that supports mmwave and how do you know for sure in advance? https://support.apple.com/kb/SP883?locale=en_US https://support.apple.com/en-us/HT201471