A. Product Features 1. The motor controller is equipped with a soft - start protection function, which can help reduce inrush current, protect the motor, and potentially extend its service life. 2. The three - digit LED motor speed controller allows adjustment of the duty cycle, the upper and lower limits of the duty cycle, and the operating frequency. 3. It has good repeatability and relatively high precision, and can be adjusted to the desired value relatively quickly. 4. This PWM DC motor speed controller comes with a start - stop button and can also be controlled by an external switch to meet various control needs. 5. The maximum power is 360W. The operating voltage ranges from DC 5V to 30V, and the input has reverse connection protection. B. Package Contents 1. 1 DC motor controller C. Product Specifications 1. The material is plastic. 2. The dimensions are 79x43x26 mm (3.11x1.69x1.02 inches). 3. The operating voltage is DC 5V - 30V. 4. The rated current is 12A, and the maximum current is 20A. 5. The maximum power is 360W. 6. The operating frequency can be adjusted in the range of 1KHz - 99KHz, with a step of 1KHz, and the default frequency is 20KHz. 7. The precision is 1%. D. Notes 1. Due to manual measurement, an error of 1 - 3 cm may occur. Please ensure you can accept this before placing an order. 2. Due to differences between different monitors, the pictures may not accurately represent the actual color of the item.