Features: Use electronic control to adjust the working speed, reliable and stable performance. DC motor governor input is direct current, can not be directly connected to AC, otherwise it will burn out. Do not reverse connect the positive and negative poles of the DC power supply, otherwise the governor will be damaged. The potentiometer knob can change the governor output duty ratio, thus changing the motor speed. The motor can be connected without any positive or negative directions. The direction can be changed by adjusting the line sequence. Specification: Applicable voltage: DC12~48V (no AC connection) Applicable current: rated current 20A; maximum current 40A; static current 0.005A Power range: within 20A for a long time; limit power 1200W Voltage regulating range: PWM output range 0% ~ 100%, (stop ~ maximum speed) PWM frequency: 25kHZ Package List: 1 x DC Motor Governor Note: This governor is only used for brush DC motor. It is not suitable for brushless DC motor and cannot be used as voltage regulator.