VEVOR Inline Duct Fan, 8-Inch 750 CFM with Variable Speed Controller, Quiet AC-motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics High-efficiency AC motor Quiet an Operation Randomly Control the Speed Ideal for Indoor Uses Complete Accessories Durable for Years to Come Airflow: 750 CFM,Noise Level: ≤ 50 dB (About 38 dB),Item Size (L x W x H): 12 x 9.3 x 11 in / 303 x 235 x 280 mm,Motor Type: Copper Motor,Model: VV-GDFJ-AC8,Air Pressure: 320 Pa,Rated Power: 126 W,Fan Speed: 2500 RPM,Item Weight: 6.8 lbs / 3.08 kg,Voltage / Frequency: AC 110V-240V, 50/60Hz