Compatibility of current brand new Ubiqiuti NanoStation

I am new here, hopfully someone can help me interpret these names for Ubiqiuti NanoStations available in my country and their compatibility with AREDN firmware. In particular, what does the inclusion NSM2 in the title mean and what is the significance of airMAX?

The device "Ubiquiti NSM2 airMAX NanoStation M2 WiFi Access Point" is available here https://www.trademe.co.nz/a/marketplace/computers/networking-modems/wireless-networking/routers/listing/4402714608?bof=6vbkPxp5
The device "Ubiquiti NanoStation NSM2 Outdoor airMAX CPE 2.4GHz, 150+ Mbps, 13+ km, 2 x 10/100 Ethernet Ports AP/Bridge" is available here: https://www.pbtech.co.nz/product/NETUBI1029/Ubiquiti-NanoStation-NSM2-Outdoor-airMAX-CPE-24GHz
These may well be the same though there is a mysterious cost difference so I am suspicious. Either way, which of the versions of AREDN firmware may work with these models.
Thanks in advance,

73s, Wilbert