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PWM DC Motor Speed Regulator Controller Board Adjustable Speed Control Reversible PWM Relay Module DC 6V-28V 12V 24V 3A 21kHz Description: DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse-Width-Modulated (PWM) The input power range is DC 6-28V Control the forward or reverse direction and the stop of DC motor by button switch. Press the green button, the motor reverses rotates; and release the button, the motor stops Press the red button, the motor clockwise rotates; and release the button, the motor stops Feature: Input supply voltage: 12V-80VDC PWM frequency: 21kHz; Duty Cycle adjustable: 0%-100% Suitable current range:current rating: 30A Potentiometer with switch function The display range of 3-digit LED display is "000"-"100". (For example, displayed "055", it means that the PWM output duty cycle is 55%.) Input supply voltage: 6V-24V DC Duty Cycle adjustable: 0%-100% Button switches included The maximum continuous output current: 3A Product Dimensions: 57 * 37 *21mm