The Concord4 is compatible, so long as it has an unregistered, Alarm.com compatible, 4G LTE cellular module.
Concord 4 modules are separate devices that are mounted outside of the alarm panel can, either nearby or run farther to an outer wall or attic, wherever the best signal is.
Opening the white plastic cover will reveal the module itself. You should find a 15-digit cellular module number printed on a sticker in the format SN:XXXXX-XXXXXXXXXX