Description: PWM Speed Controller: Precisely control low-voltage DC motor speed through pulse width modulation. High quality, reliable and easy to use with a speed control knob. Versatile for 1.8V-12V motors, suitable for mechanical experiments, DIY projects, industrial automation, and electric vehicles. Efficient and energy-saving speed control solution. Features: Precisely control low-voltage DC motor speed through pulse width modulation. High quality, reliable and easy to use with a speed control knob