Input voltage range: DC 10-60V Applicable current range: continuous current within 10A, maximum current 20A Speed range: 5% - 100% Application: This motor speed controller can be used for electric stoves, water heater temperature regulation, dimming lamps, small motor speed control, and electric iron thermostats Made with high-quality circuit board for extended service life Important Notes: 1. When the DC motor speed controller is powered, it must not be connected directly to AC power (such as household outlets), as this may cause damage 2. The positive and negative terminals of the DC power supply must not be reversed; otherwise, the speed controller may be damaged 3. Motors are not polarity-sensitive; if the rotation direction is site to the desired direction, reverse the wiring to change the direction 4. The potentiometer knob adjusts the duty cycle of the output, allowing control of motor speed PWM DC Motor Speed Controller 12V 24V 48V 20A High-Power Waterproof Drive Color: As shown Material: Plastic Package Contents: 1 x 20A DC Motor Speed Regulator Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the photo and the actual product. Measurement may vary by +/- 1-3 cm.