Specifications: (1) Working voltage: DC10V-DC50V wide working voltage range (2) Control power: 0.01-2000W (maximum rated current 40A) Different operating voltages correspond to different control powers as follows; When the working voltage is 12V, 12V*40A =480W When the working voltage is 24V, 24V*40A =960W When the working voltage is 36V, 36V*40A =1440W When the working voltage is 40V, 40V*40A =1600W When the working voltage is 50V, 50V*40A =2000W (3) Static current: 0.025A (the static current will not exceed 25ma when the working voltage is DC10V to DC50V) (4) PWM duty cycle: 5%-100% (5) PWM frequency: 12khz (6) Working temperature: -20 -- 40 (the ambient temperature is 20 degrees below zero to 40 degrees above zero). This governor is of industrial grade quality and can work stably in an environment below zero. It is a general commercial grade governor It cannot work stably below zero. Dimensions of the circuit board: length 90 mm, width 51 mm, height about 30 mm (not including the adjustment part of the potentiometer) The main purpose: 1. All kinds of general-purpose brushed DC motor speed regulation 2. Motor speed regulation for various automobiles (speed regulation of automobile cooling fan, speed regulation of automobile fan, speed regulation of automobile wiper motor, speed regulation of automobile air-conditioning fan) 3. Speed regulation of conveyor belts in the production line, speed regulation of pipeline exhaust fans, speed regulation of treadmills, parallel connection speed regulation of multiple computer fans, and speed regulation of electronic fans. 4. Dimming of various types of DC bulbs and temperature adjustment of various types of DC heaters.