1、NO SOUND AT LOW SPEED: Fully support the motor application with power supply voltage between 6V‑30V, realize zero sound when the motor rotates at low speed, and solve the problem that other speed controllers cannot be adjusted to zero 2、WITH INDICATOR: With CW and CCW indicator and power on indicator, which is convenient for you to observe and operate. Adjust the potentiometer knob can change the output duty cycle 3、REVERSED POSITIVE AND NEGATIVE POLES: The positive and negative poles of the motor can be reversed. When the operation direction is not as expected, you can change the direction by adjusting the order of the lines 4、WITH SHORT CIRCUIT PROTECTION: The maximum continuous output current is 3A, the overload short circuit protection current is 4A, and the short circuit time does not exceed 30 seconds 5、5% ‑ 95% ADJUSTMENT RANGE: PWM frequency for 500KHz, PWM pulse width adjustment range from 5% ‑ 95%, useful and practical, provide great convenience 1 x PWM DC Motor Speed Controller Item Type: PWM DC Motor Speed ControllerWorking Voltage: DC 10V - DC 30VMaximum Power: 120WRated Current: 3AMaximum Current: 4AMaximum Continuous Output Current: 3A; Overload Short Circuit Protection Current: 4A, short circuit time does not exceed 30 secondsPWM Frequency: 500KHzPWM Pulse Width Adjustment Range: 5%-95%Motor Type: Brush