The Speedster Motor Speed Controller. Control Wizard Products presents... The Speedster motor speed controller. Control the speed of your fans, or single speed routers, sanders, or other power tools.The Speedster™Fan/Blower Speed ControllerInstructions1. Before using this speed controller please read the instructions that came with your fan/blower to familiarize yourself with its operation.2. Verify that the Speed Cont... — Ships from Portland, Oregon USA...more info.