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 Controller Material: PCB Input Voltage: DC12-48V (Equal with the Rated Voltage of the Motor) Output Voltage: Linear Under Load Maximum Current: 60A Continuous Current: 40A (for Long-Term Use, Pay Attention to Heat Dissipation or Use at Low Current) Speed Regulation Type: Flow Regulation Speed Regulation Method: Potentiometer (Linear) Support Motor: DC Brush Motor Forward and Reverse: Support Speed Adjustment Range: 0-100% Control Frequency: 15KHZ Connection Type: Terminal Knob Specification: 100K (with Switch) Wiring Type: Barrier Terminal Block Features: Durable, Useful, Easy to Install Shell 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