The Mitsubishi PAR-SF9FA-E is a signal receiver for use with M-Series SLZ-KF and CITY MULTI PLFY ceiling cassette units. It allows the PAR-SL100A-E to have control over individual vane settings, dual set point on PLFY models, direct/indirect airflow and 3D i-see sensor compatibility. Requires one PAR-SL100A-E controller and one receiver per cassette unit for functionality.