VEVOR Inline Duct Fan, 102mm 129.7 CFM with Variable Speed Controller, Quiet AC-motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics Improve Air Circulation Powerful Motor Quiet Operation Adjustable Fan Speed Stable and Secure Professional Accessories Airflow: 200 CFM,Noise Level: 50 dB (About 29 dB),Item Size (L x W x H): 12 x 9.3 x 7.5 in / 304 x 235 x 190 mm,Motor Type: Copper Motor,Model: GX-04-100,Air Pressure: 165 Pa,Rated Power: 31 W,Fan Speed: 2550 RPM,Item Weight: 4.2 lbs / 1.9 kg,Voltage / Frequency: AC220-240V 50Hz