The AMS 2 Pro features two drying modules, consisting of heaters, fans and temperature sensors, with a maximum drying temperature of 65 °C.
The AMS 2 Pro heating unit (Slots 1 and 2) is an internal component designed for the filament drying function within the AMS 2 Pro for Slots 1 and 2.
Further information can be found on the Bambu Lab Wiki.