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 digit 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)*Suitable for: Brushed DC motor*Size: 100 x 76 x 28mm / 3.93 x 2.99 x 1.1" Package Includes:1 x Speed Controller