LiftMaster 821LM myQ Garage and Gate Monitor: Overview and Compatibility

The LiftMaster 821LM is a myQ-enabled device designed for smart control and monitoring of garage doors and gates.

Key Features:

The 821LM is designed to work with most major garage door opener brands manufactured after 1993, offering a convenient way to upgrade existing openers to myQ technology.
Utilize the myQ app to remotely control and monitor the garage door or gate using a smartphone or tablet. This includes features like opening and closing the door and receiving real-time alerts.

Compatible with popular smart home platforms such as Google Assistant and Amazon Alexa, enabling voice control and integration with other smart home 85

Grant secure access to family members, friends, or service providers with customizable schedules for when the garage door should be open or closed.
The myQ app provides an activity log, displaying a history of when the garage door or gate was opened or closed.
Employing encryption and security protocols to safeguard against unauthorized access, ensuring the security of your garage or gate.


The installation process generally involves connecting the 821LM to the existing garage door opener or gate operator. Some features may require compatible safety sensors.

Important Note:

Always refer to the latest product documentation, manuals, or the official LiftMaster website for the most up-to-date information regarding compatibility, features, and any potential updates. If there have been new product releases or changes in specifications, contacting LiftMaster customer support is advisable for accurate details.