1. Power Supply: 15-160VDC or 5-12VDC. If using a 5-12VDC power supply, connect the positive pole to the DC 5-12V input and the negative pole to the common cathode terminal. 2. 3 Frequencies: Features three frequency ranges: High (5.8KHZ to 127KHZ), Medium (590HZ to 15.8KHZ), and Low (82HZ to 2.3KHZ). 3. Drive Control: To control a stepper motor, connect it to a driver. Measurement frequency can be read from the PUL and common cathode terminal (GND) ports. 4. Positive and Negative Pulses: EN+ and EN- are used for positive and negative enable terminals; DIR+ and DIR- are for positive and negative direction terminals. 5. PCB Board: The stepper motor utilizes a PCB board that is resistant to high temperatures and cold, ensuring it won't deform after prolonged use, thus guaranteeing long-term stability. Item Type: PWM Adjustable Stepper Motor Controller Material: PCB Power Supply Voltage: 15-160V, 5-12V Frequency: High: 5.8KHZ to 127KHZ Medium: 590HZ to 15.8KHZ Low: 82HZ to 2.3KHZ Package Includes: 1 x PWM Adjustable Stepper Motor Controller