Heavy-duty chain drive system allows for long-lasting durable operation. Smart garage door opener comes with built-in Aladdin Connect technology that keeps you connected to your garage door opener from anywhere through a smart phone app. Works with Alexa certified. Keep your home safe with state-of-the-art security of Genie Intellicode changes the opener's access code when the remote is used. Genie's SmartSet programming makes set-up fast and easy with the simple push of a button. The DC motor is lightweight for easy installation and can provide power to operate residential sectional garage doors up to 7' tall and 500 lbs in weight. 8 foot tall with extension kit Genie tube rail extension kit C sold separately.