FeaturesCustomizable, all-in-one fan and fan/LED light combinationsPick-A-Flow™ speed selector- one fan, you choose the cfmUnique plug 'N Play™ modules provide up to three value added featuresRevolutionary DC motor with SmartFlow™ technology ensures optimal cfm outputReplaceable, GU24 base LED lamps provide warm, energy efficient illuminationIntegrated dual 4 or 6 in duct adaptor (up to 110 cfm models)Built-in metal flange provides blocking for penetrations through drywall as an air barrier and assists with the decrease in leakage in the building envelope during blower door testingFits 2 x 8 in construction1016 Ohm-cm volume resistivitySingle connectionFlex-Z Fast™ installation bracketRound duct adapter