Feature: 1. Comes with a start‑stop button, and can be controlled by an external switch to meet customers' various control needs 2. With motor soft start function, the current slowly increases when starting the motor, you can use it with confidence 3. There is no inrush current, which can effectively protect the motor and prolong the service life of the motor 4. You can set the duty cycle, the upper and lower limits of the duty cycle, and the working frequency to give you a good experience 5. Convenient for customers to operate and use according to the working characteristics of their own motors Specification: Item Type: DC Motor Speed Controller Material: ABS Working Voltage: DC 5V~30V Rated Current: 5A Maximum Current: 15A Maximum Power: 150W Working Frequency: 1KHz~99KHz Adjustable, 1KHz Stepping, Default Frequency 20KHz, Accuracy About 1% Duty Cycle: 0-100%, 1% Stepping Purpose: Change the Motor Speed Applicable Scenarios: Electronic Equipment, Machinery Manufacturing, Etc.. Package List: 1 x DC Motor Speed Controller Note: The digital encoder knob adjusts the motor speed, which has better consistency than ordinary potentiometers