Features: _x000D_ Speed controller is made with high quality circuit board which ensures a longer service life._x000D_ _x000D_ This simple and easy-to-use DC motor speed controller has an stable performance. _x000D_ Designed with a digital display that shows the rate in percentage of actual speed to maximum speed. _x000D_ This motor speed controller uses screw terminals for convenient and quick wiring. _x000D_ Comes with a momentary start/stop switch and a speed control potentiometer._x000D_ _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Input Voltage Range: DC6V-60V (input voltage should be same as motor rated voltage) _x000D_ Output Voltage: Linear with load_x000D_ Output Current: 30A_x000D_ Continuous Current: 20A _x000D_ Speed Range: 0% to 100%_x000D_ Regulation Method: Potentiometer _x000D_ Regulation Type: Regulating Current _x000D_ Control Frequency: 15KHz_x000D_ Wiring Type: Screw terminal _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 x Speed Controller _x000D_ _x000D_ _x000D_ Note: _x000D_ 1. Please allow small size error due to manual measurement. Thanks for your understanding._x000D_ _x000D_ 2. The digital tube only displays 0-100 motor full speed percentage, not the actual motor speed. For example, if the maximum motor speed is 500 rpm, it will display 100 at 500 rpm and 50 at 250 rpm.