Features: This motor speed controller can be installed to accomplish reversing the motor's direction. Designed with a digit display that shows the rate in percent of actual speed to maximum speed. Well design case can protect the controller board from damage as well as dissipate heat. The input voltage can be DC 10V to 55V. This speed controller with high power allows setting rotation direction. Elegant appearance and stable performance. High quality circuit board can ensure a longer service life. Specifications: Input Voltage: DC 10V-55V Max. Current: 60A Output Voltage: Linear with load Continuous Current: 40A Speed Range: 0% to 100% Control Frequency: 15KHz Regulation Method: Potentiometer(linear) Regulation Type: Regulating Current Forward & Reverse: Support Suitable for: Brushed DC motor Wiring Type: Screw terminal Dimensions: 11.1x7.8x5cm/4.37x3.07x1.97" (approx.) Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Includes: 1 x Motor Speed Controller