This DC Motor Speed Regulator controls the speed of a DC motor by adjusting Pulse Width Modulation(PWM). It's great for applications like car wiper motor, exhaust fan, etc. providing nice adjustment of motor speed. Features: 1. The speed control module can achieve a large adjustment range of 0-100%. 2. Stable performance, high efficiency and low noise. 3. The potentiometer is used for speed regulation, which is simple and easy to use. 4. A speed controller, enables you to control the speed of DC motors smoothly. 5. The DC motor speed control module is made of high quality electronic components, which has high stability and can maintain high stability in harsh environments. Specification: Item Type: Motor Speed Controller Operation Current: Under 2A Size: Approx. 32mm * 32 * 14mm / 1.3 * 1.3 * 0.6in Weight: Approx. 13.4g / 0.47oz Package list: 1 * Motor Speed Controller Notes: 1. DC motor governor connected to dc power supply, not directly connected to household 220V AC. 2. This is motor speed controller with maximum current 2A, continuous current greater than 0.5A, 775 motor, the motor of the children's car is not movable. 3. It is not recommended to supply more than 12V, such as 12V lead-acid battery, which may cause governor damage.