Selectable airflow settings: 50/80/100 CFM (24/38/47 L/s) Quiet operation Low Profile Design - ideal for 2x4 joist construction and taller Energy-efficient, self-compensating DC motor Continuous flow (available with applicable models) Integrated humidity sensor (available with applicable models) Integrated occupancy sensor (available with applicable models) Time delay (available with applicable models) Lighted grille (on applicable models only) Mount in the wall or in the ceiling Built-in, soft-close backdraft damper Includes one (1) adjustable hanger bar to fit a multitude of applications Duct connector included 5 year limited warranty