Features: 3-digit digital tube display helps you adjust the motor speed accurately. Easily adjust the motor speed from 0% to 100% with the potentiometer. Support Forward/Reverse rotation changeover. Solid metal shell provides better protection to the internal components of the circuit board. With screw terminals to wire with the motor and the power supply easily. Specification: Input voltage: DC10-55V (equal to the rated voltage of the motor) Output voltage: linear under load Output current: 60A Continuous current: 40A Support motor: DC brush motor Speed control mode: potentiometer (linear) Speed range: 0-100% Control frequency: 15kHz Forward/Reverse: support Knob specification: 100K (with switch) Package list: 1 * DC Motor Speed Controller 13-digit digital tube display helps you adjust the motor speed accurately. 2Easily adjust the motor speed from 0% to 100% with the potentiometer. 3Support Forward/Reverse rotation changeover. 4Solid metal shell provides better protection to the internal components of the circuit board. 5With screw terminals to wire with the motor and the power supply easily. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.