Features: The motor controller has a soft-start protection function that can effectively reduce the inrush current, protect the motor and prolong the life of the motor. The 3 digits LED motor speed regulator can adjust the duty cycle, the upper and lower duty cycle limits and the operating frequency. Good repeatability, high precision, can be quickly adjusted to the value you want. The PWM DC motor governor with start and stop button, and can be controlled by an external switch, meet your multiple control needs. Maximum power: 360W. Working voltage: DC5V~30V, input with anti-reverse connection protection. Package Includes: 1x DC Motor Controller Specifications: Material: Plastic Size: 79x43x26mm/ 3.11x1.69x1.02 in Working voltage: DC5V~30VDC Rated current: 12A Max. Current: 20A Maximum power: 360W Operating frequency: adjustable 1KHz~99KHz, 1KHz step, default frequency 20KHz Accuracy: 1% note: Please allow 1-3cm 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.