Features High quality PCB - The speed controller is made with a high-quality circuit board that ensures a longer service life. Clear digital display - The motor speed controller is equipped with a digital display that shows the rate in percent of the actual speed at the maximum speed. Quick wiring screw terminal - This motor speed controller uses screw terminals for convenient and fast wiring. Stable performance - This simple and user-friendly DC motor speed controller has stable performance. What you get: comes with a short-term start/stop switch and a potentiometer for speed control. Specifications: Input voltage range: DC6V-60V (input voltage should be equal to motor rated voltage) Output voltage: linear with load Output current: 30 A. Continuous current: 20 A. Speed range: 0% to 100%. Control method: potentiometer Regulation Type: Regulating Current Control frequency: 15 KHz. Wiring Type:Screw Terminal Package includes: 1 x speed controller. Note: 1. Please allow small size errors due to manual measurement. Thank you for your understanding.2. The digital tube shows only 0-100 full speeds of the engine in percent, not the actual engine speeds. For example, if the maximum engine speed is 500 rpm, 500 rpm will show 100 rpm and 50 at 250 rpm. Package List