1High Accuracy Simulation Tachometer: DC motor governor achieves real time monitoring of motor speed to ensure stability and safety. And you can make adjustments timely. 2Intelligent Speed Control: Automatically adjust motor speed as needed, energy saving, environmentally friendly, and improving work efficiency. 3Adjustable Speed Settings: Adjust motor speed through buttons and knobs, this motor governor is suitable for various DC motor types. 4Work Details: Motor speed regulator is made of premium ABS material with a working voltage DC 655V, maximum current 30A, 4 digit display, control frequency 15KHZ, embedded installation. 5Easy To Install: Electric motor speed controller has an innovative all in 1 design, no additional installation required. Easy to operate for convenient use. 1 x Speed Controller 1 x User Manual