Specifications Model: BT-WL20A Quantity: 2 Noise Level: 60 dB Speed Settings: 3 Air Speed: 23 ft/s (7 m/s) Air Volume: 3500/4000/4650 CFM Fan Blades Diameter: 20 inch / 50.8 cm Material: All Metal Power: 70 W Voltage: AC 120 V / 60 Hz Speed: 1450 RPM Cover Area: 30 ft / 9 m Package Content 1 x Industrial Wall Fan 1 x User Manual