Description: This is a simple and easy-to-use DC motor speed controller of elegant appearance and stable performance. It is made with high quality circuit board which ensures a longer service life. The input voltage can be DC 10V to 50V and control power from 1200W to 3000W(peak). This speed controller is a universal one which can be used on many DC brush motors in car cooling fan motor, car air conditioning motor, exhaust blower, etc. Features: This simple and easy-to-use DC motor speed controller has an elegant appearance and stable performance. This motor speed controller is of high quantity for industrial use that can work normally when operation temperature is below zero Celsius. Well design case can protect the controller board from damage as well as dissipate heat. Universal speed controller can be used for DC brush motor, suitable for car cooling fan motor, car air conditioning motor, exhaust blower, treadmill motor, etc. This motor speed controller can also be used for dimming DC lamps or controlling DC heater. Specifications: Working Voltage: DC10V to DC50V Max. Rated Current: 60A Peak Current: 100A Control Power: 0.01W to 3000W Power Alters According to Voltage: 12V*100A =1200W 24V*100A =2400W 30V*100A =3000W 50V*100A =5000W(peak) Quiescent Current: 0.04A( not over 40mA when voltage is DC10V to DC50V) PWM Duty Cycle: 0%-100% PWM Frequency: 15khz Operation Temperature: -20 to 40 Size: 14.6 x 8 x 3.8cm / 5.74 x 3.15 x 1.49" Package Includes: 1 x Speed Controller