VEVOR 20 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 4800 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,Black

VEVOR 20 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 4800 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,BlackElectrostatic CoatingSpiral Fan BladesWeather-Resistant BuildRobust HousingFlexible MountingBroad CompatibilityAirflow: 4800 CFM,Noise Level: ≤70 dB(A),Air Speed: 6.5 m/s,Item Model Number: AMX-FAGEC20,Item Dimensions: 23.03 x 23.03 x 8.54 in / 585 x 585 x 217mm,Louver Opening Angle: ≥50-Degree,Net Weight: 16.42 lbs / 7.45 kg ,Power: 75W ,RPM: 1000 RPM,Main Material: Q235B Carbon Steel,Rated Voltage: AC 120V 60Hz