PWM Regulator 12V 5A

PWM 12V DC Motor Speed Controller Module DC-DC 4.5V-35V Adjustable Speed Regulator. This small component allows for a smooth reduction or increase in engine speed without loss of torque.
Aliexpress: https://s.click.aliexpress.com/e/_AsapF1
Amazon: https://amzn.to/37DBtgO

How is PWM module built in?
Watch short tutorial video about OWM controller assembly:
