Introduction 1. Knob to adjust 0-100% 0-100 values ??displayed simultaneously on the digital screen for easy positioning speed improve the quality of equipment. 2. PWM modulation frequency 16khz get your motor quiet low-speed torque full. 3. Product quality and reliable low heat the tiny shell is a high-tech core. 4. Standard industrial-grade touch of a button push the button that goes to sleep press again to start working again. Note: 1. DC power not to reverse the positive and negative terminals otherwise the governor may be damaged. 2. Motors can be positive or negative regardless of when the direction is inconsistent with expectations can be changed by adjusting the direction of line sequence. 3. Adjust the potentiometer knob to change the governor output duty cycle the motor speed change.