Product name: Qudai 200A. Output Voltage: Linear under load. Continuous current: within 100A is recommended. Forward and reverse: bidirectional. Speed regulation mode: potentiometer (0-5V). Support motor: DC brush. Module size: lengthwidthheight 215mm113mm50mm. Potentiometer according to installation opening: 10mm. 0-100 digital display is the percentage of speed, not the actual speed of the motor. The input voltage must be positive and negative, and 220V household electricity cannot be input. The input voltage should be equal to the rated voltage of the motor (within 12-48V). Such as motor rated voltage 12V input 12V motor 36V input 36V. Please kindly note that. Also, the each additional item means. The the same color and size. Transit time may be a little delayed because of the. If you have any questions.