VEVOR 24 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 2900 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,BlackElectrostatic CoatingSpiral Fan BladesWeather-Resistant BuildRobust HousingFlexible MountingBroad CompatibilityAirflow: 2900 CFM,Noise Level: ≤75 dB(A),Air Speed: 6.6 m/s,Temperature Rise: ≤70K,Item Model Number: AMX-FAGEC24,Item Dimensions: 23.03 x 23.03 x 8.54 in / 585 x 585 x 217 mm,Louver Opening Angle: ≥50-Degree,Net Weight: 22.71 lbs / 10.3 kg ,Power: 85W,RPM: 920 RPM,Main Material: Q235B Carbon Steel,Rated Voltage: AC 120V 60Hz