Features: 1. Designed with a LED Digital Display panel for easy reading and convenient setting of speed adjustment. 2. Can set the slow start and slow stop time of DC motor. 3. The maximum and minimum speed of the motor can be adjusted, and the speed increase can be set. 4. This is a simple and easy-to-use DC motor speed controller of small size, stable performance. 5. Easy to operate, can reduce the mechanical stress on the motor and shaft. 6. Suitable for DC brush motor speed control. Specification: Condition: 100% Brand New Item Type: Motor Speed Controller Input Voltage: DC 9-60V Output Voltage: Linear Under Load Output Current: 30A Continuous Current: 20A Speed Range: 0%--100% Control Frequency: 21Khz Speed Control Mode: Button Digital Positioning: 0-100 (Percentage) Wiring Type: Wire Support Motor: DC Brush Motor Package List: 1 * Motor Speed Controller Function panel description: 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. 2. Slow stop time setting Range: 000 - 100 Slow stop time is adjustable between 0-10 seconds, the default is 1 second. 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. 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%. 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%. Wiring Method: NO Color Signal 1 Red Power + 2 Black Power - 3 Blue Motor + 4 Green Motor -