Features:_x000D_ 1. Designed with a LED Digital Display panel for easy reading and convenient setting of speed adjustment._x000D_ 2. Can set the slow start and slow stop time of DC motor._x000D_ 3. The maximum and minimum speed of the motor can be adjusted, and the speed increase can be set._x000D_ 4. This is a simple and easy-to-use DC motor speed controller of small size, stable performance._x000D_ 5. Easy to operate, can reduce the mechanical stress on the motor and shaft._x000D_ 6. Suitable for DC brush motor speed control._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: Motor Speed Controller_x000D_ Input Voltage: DC 9-60V (Include 9V 12V 24V 36V 48V 60V )_x000D_ Output Voltage: Linear Under Load_x000D_ Output Current: 20A_x000D_ Continuous Current: 12A_x000D_ Speed Range: 0%--100% _x000D_ Control Frequency: 21Khz_x000D_ Speed Control Mode: Button_x000D_ Digital Positioning: 0-100 (Percentage)_x000D_ Wiring Type: Wire_x000D_ Support Motor: DC Brush Motor_x000D_ _x000D_ Package List:_x000D_ 1 * Motor Speed Controller_x000D_ _x000D_ Function panel description:_x000D_ 1. Slow start time setting Range: 000 - 100 slow start to 100% speed time is adjustable between 0-10 seconds, the default is 1 second._x000D_ 2. Slow stop time setting Range: 000 - 100 Slow stop time is adjustable between 0-10 seconds, the default is 1 second._x000D_ 3. Speed lower limit setting Range: 000- 080 The minimum speed is adjustable between 0-80%, and is less than the maximum speed setting. The default is 0._x000D_ 4. Speed upper limit setting Range: 000- 100 The maximum speed is adjustable between 0-100% and is greater than the minimum speed setting. The default is 100%._x000D_ 5. Acceleration and deceleration value setting If the setting parameters are 001, 002, 005, 010, 015, 020, 025. Each time you press the plus or minus button, the speed changes by 1%, 2%, 5%, 10%, 15%, 20%, 25%._x000D_ _x000D_ Wiring Method: NO Color Signal _x000D_ 1 Red Power + _x000D_ 2 Black Power - _x000D_ 3 Blue Motor + _x000D_ 4 Green Motor -