Features: -DC 9V~60V DC Speed Regulator-Products are equipped with external speed control knob(with turn off switch)-Products are equipped with a run-stop-reverse switch-The circuit is stable and reliable, and the heat radiation board area is two times more than that of the same product in the market-The speed regulator uses PWM technology, which has the characteristics of high conversion efficiency, wide speed regulation range and stable performanceParameters: Working voltage:DC 9 V~60 V (wide range)Size(L*W*H):92 x 52 x 36 mmPeak current: 20 ASpeed range: 0%~100%Forward reverse:SupportOutput voltage: Load linearSpeed principle:Current regulationSpeed control type: Adjust the currentSpeed adjustment way: Potentiometer (with turn off switch)Red wire connection: power supply + Black wire connection: power supply negative-Blue wire connection: motor positive + Green wire connection: motor negative-Package Include:1 x PWM Controller Note: -This DC motor controller input is connected to direct current, CANNOT be connected to alternating current, or it will be burnt. The motor cannot be used in electric vehicles.-Make sure the positive and negative polarity is connected correctly, otherwise the controller will be damaged.