Speed-Commander Vector Digital SC 750 Universal AC Motor Controller 3X4 AMP. Used but in good working condition. Pulled from a fully working environment. All the best /Klaus. Speed-Tech SC 750 Universal AC Motor Controller Vector Digital, Used – Excellent Condition. For sale is a Speed-Tech SC 750 Universal AC Motor Controller from the Speed-Commander Vector Digital series. This reliable device is designed to control and adjust the speed, direction, and torque of AC motors, making it perfect for a variety of industrial applications. Made in Denmark, it showcases superb European craftsmanship and engineering. Manufactured by Speed-Tech A/S, Denmark. Includes features such as Step, Store, UP, and Down buttons for easy operation. The controller is used but in good working condition. It has minimal signs of wear and has been tested to ensure full functionality. The unit you receive is exactly as pictured, so please review all photos for the best understanding of its condition. Professionals looking for a dependable motor controller for industrial machinery, automated systems, or custom DIY projects.