A Rotary Potentiometer is a variable resistor that allows you to adjust resistance by turning a knob or shaft. This pack includes 10 potentiometers, each with a 1M ohm resistance rating. Potentiometers are widely used in electronic circuits for tasks like adjusting volume in audio equipment, controlling brightness in lighting circuits, and setting parameters in various applications. These potentiometers feature a rotary design, making them ideal for precise resistance adjustments in your projects.