10" Aero Flo 650 HIGH CFMs inline Duct Air Booster Fan 10" Aero~flo Fan Booster Specifications: 650 Max C.F.M. 257F maximum operating temperature 120 Volt / 60 hz motor / 35.0 Max Watt / 0.43 Max Amps High quality galvanized hard steel housing & fan Blade material