@Virgo I see, thanks for the link seems the info are generic and have to assume that eap 660hd 2.4Ghz radio came with 802.11ax (wifi 6) tech, hope this is true and not follow unifi u6 LR / lite that...

*to confirm 2.4Ghz are capable of wifi ax

I'm changing my current unifi setup 1x u6 LR , 4x u6 Lite, that currently support wifi 4 only on their 2.4Ghz radio, currently buying omada 3x 653 and their jet stream smart switch, which is wifi 6...