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 55V. This speed controller with high power allows setting rotation direction. Features: Speed controller is made with high quality circuit board which ensures a longer service life. This simple and easy-to-use DC motor speed controller has an elegant appearance and stable performance. Well design case can protect the controller board from damage as well as dissipate heat. Designed with a digital display that shows the rate in percent of actual speed to maximum speed. This motor speed controller would allow setting direction of rotation that accomplishes reversing the motor's direction. Specifications: Input Voltage: DC10V-55V Output Voltage: Linear with load Max. Current: 60A Continuous Current: 40A Speed Range: 0% to 100% Forward & Reverse: Support Regulation Method: Potentiometer(linear) Regulation Type: Regulating Current Control Frequency: 15KHz Wiring Type: Screw terminal Rotary Knob: 100K(with switch) Size: 110 x 78 x 38mm / 4.33 x 3.07 x 1.49" Package Includes: 1 x Speed Controller .