Specification AirFlowCapacity : 190 cubic_feet_per_minute Brand : VIVOSUN BulletPoint1 : Energy-Efficient Ventilation: This powerful blower with a fan speed of 2300 RPM can create an air flow of 190 CFM; It combines the features and benefits of axial and centrifugal fan, effectively circulating air BulletPoint2 : Low Noise Level: The durable fan blades revolve smoothly and powerfully, which helps collect airflow volume and cut noise output; A less than 30 dB noise level will not disturb your work BulletPoint3 : Adjustable Speed: A stepless speed controller on the power cord enables the fan to run at different speeds; With this speed switch, you can adjust it to the desired airflow level BulletPoint4 : Easy Installation: This duct fan is compact and lightweight so it can be installed in small areas; Comes with an installation bracket indicating the direction of the airflow; Removable duct ends with locking tabs BulletPoint5 : Versatile Applications: Suitable for industrial, household and horticulture ventilation applications; It can quietly and efficiently moving large volumes of air throughout your ventilation system Color : 4" Fan ControllerType : Button Control ControlMethod : application ElectricFanDesign : blower ExternallyAssignedProductIdentifier1 : 714119464157 ExternallyAssignedProductIdentifier2 : 0714119464157 IncludedComponents : Cord IsElectric : 1 ItemName : VIVOSUN R4 4 Inch 190 CFM Inline Duct Ventilation Fan with Variable Speed Controller for Grow Tent ItemPackageDimensions_Height : 31.242 centimeters ItemPackageDimensions_Length : 22.352 centimeters ItemPackageDimensions_Width : 22.606 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : greenhouse-ventilation-equipment Manufacturer : VIVOSUN Material : Plastic ModelNumber : 1 NoiseLevel : 30 decibels NumberOfBlades : 10 NumberOfBoxes : 1 PartNumber : 1 PowerSourceType : Electric ProductDescription : Featuring a brushless motor with durable blades and lubricated bearings, the VIVOSUN inline duct fan can solve most of your ventilation issues. Its variable fan speed controller enables you to optimize airflow and noise level for any application. A perfect solution for multi-purpose use in both residential and commercial ventilation! ProductSiteLaunchDate : 2016-04-07T09:12:28.131Z RecommendedUsesForProduct : VERSATILE APPLICATIONS: Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control. Size : 4 Inch Style : R4 4 Inch SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 40101500 Voltage : 110 volts Wattage : 59 watts