This model includes a one/two horsepower motor that may be perfect for lifting most one or double garage doors, and it utilizes a belt drive process, and that is recognized for being quieter than the standard chain drive techniques. Using a screwdriver, change the limit adjustment screw in modest increments. https://youtu.be/wSkWTAdm-Gg?si=pR5EXdjVuNYjtHN7