Description: This is a simple and easy-to-use DC motor speed controller of small size, elegant appearance and stable performance. It is made with high quality circuit board which ensures a longer service life. The current can be adjusted from 0A to 30A which is quite convenient to set. Features: Speed controller is made with high quality circuit board which ensures a longer service life. This simple and easy-to-use DC motor speed controller has an stable performance. The output current of this motor speed controller can be adjusted from 0A to 30A, and it is simple to set. Designed with a digital display that shows the rate in percent of actual speed to maximum speed. This motor speed controller uses screw terminals for convenient and quick wiring. The positive and negative pole of controller must be connected correctly, otherwise, the item might be burnt. The input voltage of controller is better to be same as rated voltage of motor. Specifications: Input Voltage: DC 6V-60V Output Voltage: Linear with load (voltage drop at motor 2 terminals ) Output Current: 0A-30A Continuous Current: 20A Speed Range: 0% to 100% (variable) Regulation Method: Potentiometer (Linear) Regulation Type: Regulating Current (cannot be used as a voltage regulator) Control Frequency: 15KHz (pulse width) Wiring Type: Screw terminal Rotary Knob: 100K with switch (270) Size: 75x56mm/2.95x2.2 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 Speed Controller