Features: This motor speed controller offer a wide input of 9V to 55V and deliver output up to 2000W with 40A current limit, making it ideal for demanding motor and applications. Featuring speed regulation technology, easy to use terminals for quick installation with quality PCB and metal component for heat dissipation. Designed for industrial professional, enthusiasts, and engineers who need efficient and accurate motor control for various projects and equipment. Perfect for diverse scenarios such as driving fan, electric tools, and other motor requiring adjustable speed in workshops or industrial settings. With its robust construction and advanced features, this motor driver ensures consistent and energy efficiency for long term use in multiple environments. Specifications: Component:Metal+PCB Size:Approx. 83x56x26mm/3.27x2.2inch Input : 9-55V Output limit current: 40A Power: 2000W Control frequency: 25KHZ Knob cord length: 20CM Package Includes: 1Pc Motor Governor note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.