The atoms AT-1611 garage door opener has a powerful _ hps dc motor which provides quiet operation when compared to traditional garage door openers. This unit includes a built-in 12W LED for long-lasting illumination, push button, one button remote, chain drive and 7ft Sectional rail. This unit also features a soft-start and soft-stop function to reduce wear and tear on the motor and mechanical parts. The skylinknet compatibility allows users to control the garage door opener with a smartphone from anywhere (Skylink internet hub hu-100 - sold separately). the backup battery (sold separately) with a built-in LED light keeps garage door opener functional in the event of a power outage. You can also use your in-car garage door remote to control this AT-1611. For added security, the AT-1611 includes rolling code technology that generates a unique code for every remote activation. This encrypted code is different from the previous one which prevents your neighbor accidently opening your garage door when using their Skylink remote.