Adjustable DC Motor Speed PWM Controller 10-30V Reversing Switch 120W PWM controller：maximum continuous output current:3A. Overload short circuit protection current:4A ,short circuit time does not exceed 30 seconds. Working Voltage:DC 10V - DC 30V Maximum output power:120W.Potentiometer for speed control,Forward and reverse switches for forward, reverse and stop control. PWM Frequency: 500 KHz PWM Pulse Width Modulation Range: 5% -95%. Applicable Motor:brushed motor.This controller uses PWM speed control tech, which has high conversion efficiency, wide speed control range, stable and reliable circuit. Please note：when the controller frequency is low, motors targeting some will have a modulation sound at low speeds, but not all.

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Wiring instructions for Power Supply (Voltage >10V, but, <30V): - Connect the power cord after ensuring the Forward and Reverse switch is in the middle Zero/Stop position. - Ensure that the power output meets the motor's operating requirements. - Connect the DC power supply (Voltage >10V, but, <30V). - Do not reverse the positive and negative terminals of the DC power supply, otherwise, the controller may get damaged. - Connect the motor, the motor line can not be divided into positive and negative. - The switch is used to control the direction of the motor, the motor stops at the middle (zero) position of the switch. - The motor speed can be changed by adjusting the knob of the potentiometer. This controller supports the use of 0-10V external DC voltage control by the following steps: - Remove the potentiometer. - Connect the 0-10V DC control signal to the center pin of the potentiometer. - Connect the ground wire of 0-10V DC control signal to the right pin of the potentiometer.