1[CW CCW Switch] The DC motor speed controller features a CW CCW reversible switch, allowing for easy and flexible operation between forward and reverse directions as needed. 2[Precise Speed Monitoring] This digital motor speed controller is equipped with a simulated tachometer, accurately displaying the motor speed to help users monitor performance. 3[Clear Digital Display] With a 4 digit digital tube display, the motor speed controller provides a clear and easy to read output, promoting efficient performance tracking. 4[Simple Controls] The motor driver controller adopts simple operation method, with buttons and a knob for quick and easy speed adjustments. 5[Wide Voltage Input] Catering to a wide input range of 10 to 55V DC, our motor speed regulator accommodates various applications, enhancing its versatility. Item Type: DC Motor Speed Controller Material: ABS Input Voltage: DC10-55V Maximum Current: 40A Display Method: 4 Digit Digital Tube Speed Regulation Type: Current Regulation Speed Regulation Method: Button and Knob Control Frequency: 15KHZ Forward and Reverse: Bidirectional Wiring Type: Fence Type Terminal 1 x DC Motor Speed Controller 1 x User Manual Have a great time shopping!