<b>VIVOSUN Duct Fan Inline Fan for Household / Grow Room Ventilation</b><br><br> <b>Item Specifications:</b><br> -Diameter: 4 inch<br>-Power Supply: 110/120V<br> -Power: 12 W<br> -Speed: 2930 RPM<br> -Air Flow: 100 CFM<br> -Cord Length: 5.5 feet<br> -Warranty: 1-Year<br> <br><br><b>Key Features:</b><br> -Perfect for boosting air flow in long runs of ducting<br>-Energy efficient & quiet operation<br> -Lightweight & super easy to install<br> -Fluted on both ends to receive ducting<br> -Balanced metal blades are ideal for boosting air supply and venting exhaust air<br> -Engineered for maximum boost with minimum noise<br> -Motor features a permanently lubricated bearing that operates quietly and requires no maintenance<br> -Solve air delivery problems without major system rework or expense<br> -Can be installed in any location, such as bathrooms, attics, greenhouses, tents, etc.