Characteristic: 1. The speed controller is made of high-quality circuit board, which ensures a longer lifespan 2. This simple and easy to use DC motor speed controller has stable operation 3. Designed with a digital display showing the percentage of actual speed up to maximum speed 4. This motor speed controller uses screw terminals for convenient and fast wiring 5. Includes instantaneous start/stop switch and speed control potentiometer Specification: Input voltage range: 6V-60V DC (input voltage should be the same as motor rated voltage) Output voltage: linear with load Output Current: 30A Continuous Current: 20A Speed Range: 0% to 100% Adjustment method: potentiometer Adjustment Type: Adjustment Current Control Frequency: 15 kHz Wiring Type: Screw Clamp List of packages: 1 x Speed Controller Note: 1. 2. The digital tube-shaped displays only a percentage of the full speed of the 0-100 motor, not the actual speed of the motor. For example, if the maximum speed of the motor is 500 rpm. /min, displays 100 at 500 rpm. /min and 50 at 250 rpm. double-sided printing (duplex): yes