Product details:

The Chain Drive 550 is a factory-assembled chain drive garage door opener that provides value and durability. The 1/2 HPc DC motor operates powerfully and quietly with a soft start and stop control, making installation easier and door travel smoother (an improvement over AC motors). The unit has a precision factory-assembled chain drive system that provides long and reliable performance. The precision machined motor and gearbox are greased and sealed from the environment for long lasting, reliable performance. The garage door opener features Genie'sSmartSet programming making for fast and essy setup with the simple push of a button. For added security, the Chain Drive 550 is enhanced withIntellicode security technology that changes the access code on each door activation to help prevent unauthorized access. The included Safe-T-Beam system helps prevent accidents via an invisible infrared beam across the door opening that will reverse the door if an object crosses the LED beam of light. HomeLink andCar2U compatibility links to car's built-in remote system. UNit works on residential sectional garage doors up to 7 feet in height and 500 lbs. in weight. With the use of the extension kit the unit can be upgraded to accommodate an 8 feet high garage door. Accessories included (2) Pre-programmed 3-button remotes, a Multi-Function Wall Console with vacation lock and light control button and a self diagnostic Safe-T-Beam system.