new Type: speed controller Operating Voltage: DC 10V~DC 50V Control Power: 0.01-3000W (maximum rated current of 60A) different operating voltages corresponding to different control power as follows: Operating Voltage 12V, 12V * 100A = 1200W Operating Voltage 24V, 24V * 100A = 2400W Operating Voltage 30V, 30V * 100A = 3000W Quiescent Current: 0.04A (operating voltage DC10V to DC30V quiescent current not exceed 40ma) PWM Duty Cycle: 0% -100% PWM Frequency: 15khz Operating temperature: -20Celsius~40Celsius (ambient temperature of minus 20 degrees to 40 degrees ) The governor of the industrial-grade quality, can be less than zero stable work environment, general commercial-grade quality of governor in It is not stable work in temperatures. Circuit board Dimensions: 145x80x40mm / 5.7inch x 3.1inch x 1.6inch (not including adjustment portion potentiometer) Application: Various types of general-purpose DC brush motor speed Various types of vehicles with motor speed (automotive cooling fan