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G821LMB-2SENSOR LiftMaster myQ® Smart Garage Door Sensor

  • Add a second opener to myQ Smart Garage Hub.
  • Works with either 821LMB or 821LM.


This add-on door sensor works with your myQ® Smart Garage™ Hub or myQ Garage™ to monitor and control a second garage door opener.


Accessory Warranty: 1 Year


  • Compatible with the myQ Smart Garage Hub (821LMB) and myQ Smart Garage Hub (821LM) – sold separately.
  • Please note: This product replaces both 821LM-SENSOR and 821LMB-SENSOR and can be used as a replacement for either one.

Ready to find out more?

myQ® Smart Garage Hub Quick Start Guide

G821LMB-2SENSOR Instructions