The Carrier SYSTXBBECC01-C Evolution Connex Control is an advanced thermostat and system control designed for compatible Carrier Evolution HVAC equipment. It communicates with connected heating and cooling components to monitor conditions and manage temperature, airflow, operating modes, and system settings. Commonly used with compatible furnaces, air conditioners, heat pumps, and fan... https://www.partshnc.com/systxbbecc01-c-carrier-evolution-connex-control