Master Flow ERV4BL Power Attic Vent with Thermostat, 480 sq-in Net Free Ventilating Area, 1000 cfm Air, Steel, Black Exterior Paint the active microphones help you

the active microphones help you hear conversations around you

give users more control for a wide range of fastening tasks

8 TPI design

latch 1 in x 2-1/4 in

Master Flow ERV4BL Power Attic Vent with Thermostat, 480 sq-in Net Free Ventilating Area, 1000 cfm Air, Steel, Black Exterior Paint the active microphones help youPre wired roof mount attic vent and thermostat control, helps exhaust large amounts of hot and humid air from your attic, helps protect your roofing system and promotes your home's energy efficiency, energy efficient PSC (permanent split capacitor), includes internal heavy duty screen which helps prevent animal infestation.