1. Speed regulation of general-purpose DC brushed motors. 2. Speed regulation of automotive motors (automobile cooling fan speed regulation, automotive fan speed regulation, automotive wiper motor speed regulation, automotive air conditioning fan speed regulation). 3. Speed regulation of production line conveyor belts, pipeline exhaust fan speed regulation, treadmill speed regulation, parallel speed regulation of multiple computer fans, electronic fan speed regulation. 4. Dimming of DC bulbs, temperature regulation of DC heaters. Working voltage: DC10V-DC50V wide working voltage range Control power: 0.01-3000W (maximum instantaneous starting current 60A, long-term working current should be controlled within 30A.) Different working voltages correspond to different control powers as follows: When the working voltage is 12V, 12V 60A=720W When the working voltage is 24V, 24V 60A =1440W When the working voltage is 36V, 36V 60A=2160W When the working voltage is 40V, 40V 60A =2400w When the working voltage is 50V, 50V 60A =3000w Quiet current: 0.04A (When the working voltage is DC10V to DC50V, the static current not exceed 40ma) PWM duty cycle: 5%-100% PWM frequency: 15khz Working temperature: -20C to 40C (Ambient temperature -20 degrees Celsius to +40 degrees Celsius) This speed regulator is of industrial quality and can work stably in an environment below zero degrees. Generally, commercial-grade speed regulators cannot work stably below zero degrees. Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour:As Shown Material:PCB Package Contents: 1 x Motor Speed Controller kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.