Specifications:With positive and negative switch, potentiometer knob with switch, you can use PLC to control positive and negative.The forward and reverse switch can be replaced with a jog switch.The digital display is the percentage of motor full speed 0-100, not the actual speed of the motor.The input voltage must be positive and negative.The input voltage should be equal to the rated voltage of the motor within 10-55V DC. Item Name: DC Brushed Motor ControllerMaterial: PCBInput Voltage: DC12-48V (Equal with the Rated Voltage of the Motor)Output Voltage: Linear Under LoadMaximum Current: 60AContinuous Current: 40A (for Long-Term Use, Pay Attention to Heat Dissipation or Use at Low Current)Speed Regulation Type: Flow RegulationSpeed Regulation Method: Potentiometer (Linear)Support Motor: DC Brush MotorForward and Reverse: SupportSpeed Adjustment Range: 0-100%Control Frequency: 15KHZConnection Type: TerminalKnob Specification: 100K (with Switch)Wiring Type: Barrier Terminal BlockFeatures: Durable, Useful, Easy to InstallShell Size: 11cm x 7.8cm x 3.8cm/4.33 x 3.07 x 1.49 (Approx.)Main Board Size: 10cm x 7.6cm x 2.8cm/3.94 x 2.99 x 1.1 (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Included:1 x DC Brushed Motor Controller