High Grade: This PWM Motor Speed Controller is made of premium quality ABS material, which has a good durability and wear-resistance to ensure a long term service, you can use it for a long time Easy Installation and Operation: This Motor Speed Controller adopts with screw terminals for convenient and quick wiring, and it also comes with an adjustable momentary start/stop switch and a speed control potentiometer to ensure an easy and convenient control, you can control it easily LED Display Design: This DC Motor Speed Controller designed with a a digital display, which shows percentage rate of actual speed to maximum speed, so the data is readable through the LED display, you can get a precise data easily Wide Input Voltage Range: This PWM DC Motor Speed Controller supports a widely input voltage from DC 6V to DC 60V, and it fits to 12V 24V 36V 48V power supply, at the same time the output current is 0A-30A, which ensures a widely application. You can use this Adjustable Motor Controller in different occasions upon different purposes Stable Performance: This simple and easy-to-use Motor Controller has an stable performance, and it has a momentary start/stop switch and a speed control potentiometer for easy operation, you can regulator it through the potentiometer to provide a better and stable performance Output Voltage: Linear with load Continuous Current: 20A Speed Range: 0% to 100% Regulation Method: Potentiometer Regulation Type: Regulating Current Control Frequency: 15KHz Wiring Type: Screw terminal colour: as shown Material: ABS Size: 9.6x6.1x3.4cm Package Contents: 1 x PWM DC Motor Speed Controller