TruePower 123 Variable Dial Router Speed Controller for Duct and Inline Fans 120V 60Hz maximum 15 Amps with Built in Fuse Rocker switch with Off, Full speed, or Variable Speed settings Plug your router into this control unit & you instantly have a variable speed tool Works with any universal AC brush type motor with min. 1/3 HP Line cord: 6 feet, 3 wire double insultated, 18 AWG UL listed 120V 60Hz maximum 15 Amps with Built in Fuse Rocker switch with Off, Full speed, or Variable Speed settings Plug your router into this control unit & you instantly have a variable speed tool Works with any universal AC brush type motor with min. 1/3 HP Line cord: 6 feet, 3 wire double insulated, 18 AWG UL listed