The Chamberlain Group is a manufacturer of garage door openers based in the United States. It has been operating since 1954. The company has two product lines. The Chamberlain line is for openers with do-it-yourself installation. It features chain drive and belt drive models. The motor options include 1/2 horsepower, 3/4 horsepower and 1 1/4 horsepower. The main accessories include remote controls, a wall-mounted button, a pair of safety sensors and a wireless keypad. There are models with advanced features and capabilities such as operation with the use of internet-enabled devices. The LiftMaster line offers devices which are designed for professional installation.
Each Chamberlain garage door opener comes with multiple-piece rail. The pieces are neatly packed for easy transportation in a car. They are put together during the opener installation process. The assembled rail is connected to the power unit of the operator on one side and to the door on the other.