Feature: The product is made of high-quality electronic components with stable and reliable performance. PWM is the regulating and controlling mode of products. This is a DC motor controller. Please don't use it on AC motors. The product is compact and easy to install in narrow space. The product adopts aluminum casing, which has good heat dissipation effect and can effectively extend the service life of the product. Specification: Input voltage: DC 9-60V Output voltage: Linear load Current: 10A ; 20A (Optional) Ultimate power: 1200W Speed regulation type: PWM Speed regulation mode: Potentiometer (linear) Speed range: 0 - 100% Control frequency: 25KHZ Module size: 92mm*52mm*36mm Weight: 132g / 4.6oz Installation size: the back fixing hole center distance 104MM Installation opening: 7mm Package list: 1 * Motor Speed Controller Note: Within 10A for a long time, pay attention to keep the module cool. DC motor governor connected with DC power supply, must not be directly connected to 220V AC. The motor can be connected without any positive or negative. When the running direction is inconsistent with the expectation, the direction can be changed by adjusting the line sequence. The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. 1、The product is made of high-quality electronic components with stable and reliable performance. 2、PWM is the regulating and controlling mode of products.? 3、This is a DC motor controller. Please don't use it on AC motors. 4、The product is compact and easy to install in narrow space. 5、The product adopts aluminum casing, which has good heat dissipation effect and can effectively extend the service life of the product.