EFFECTIVE VENTILATION: Powerful blower with a fan speed of 2550 RPM for an air flow of 390 CFM. Moves air through your targetlocation efficiently for optimal ventilationLOW NOISE LEVEL: Durable plastic fan housing and blades for extremely low noise(<37 dB); Variable speed controller for easy fanspeed adjustment.EASY INSTALLATION: Removable duct ends with locking tabs for quick removal and easy maintenance and a cord length of 5.4 feet forhassle free setup.VERSATILE APPLICATIONS: Suitable for industrial, household and horticulture ventilation applications for air clean and temperaturecontrol. 1. Voltage: 110-120V, 60Hz or 220-240V, 50Hz, or customized according to customer requirements.2.Diameter: 100mm-200mm.3. Material: shell PP; blade ABS4. Color: white.5. Operating temperature range: -20℃~60℃6. Energy saving and long life.7. Suitable for indoor ventilation Product Description