LiftMaster 821LMC-S Smart Garage Control

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LiftMaster’s 821LMC-S Smart Garage Controller allows you to control, secure, and monitor your garage door with a smartphone from anywhere in the world. The 821LMC-S is a Universal Smart Controller designed to work with all major brands of garage door operators manufactured after 1993, converting existing openers to smart garage door openers. This new device is meant to replace LiftMaster’s previous Smart Garage control products, offering a simplified DIY installation and a sleek modern white finish that blends in with ceilings, walls, and garage doors. Receive real-time alerts, set up secure in-garage delivery through Key by Amazon, and control your door with smart devices like smartphones, tablets, and computers with the 821LMC-S Smart Garage Controller from Action Industries.


  • Securely monitor and control most garage door brands and garage lighting with a smartphone, tablet, or computer, as well as with standard remotes and keypads

  • Replacement Smart Garage Controller for LiftMaster 821LMB (Chamberlain MYQ-G0391)

  • Smart home add on turns a standard operator into a Wi-Fi garage door opener

  • Includes door sensor that mounts to the garage door

  • Additional sensor required for controlling a second door

  • Wi-Fi hub mounts near the opener and plugs into a wall outlet. The connectivity hub wirelessly communicates through a wireless router

  • Receive alerts as emails or pop-up (push) notifications on your mobile device so you always know the status of the door

  • Improved Set Up: Bluetooth Low Energy integration makes setup easier than ever, download the MyQ app and set up in minutes

  • Compatible with smart home technology including Nest, Wink, IFTTT, Apple Homekit,

  • Google Assistant, Key by Amazon, Siri, Android, Google Home, and iPhone

  • DIY Smart Controls for any homeowner

Product Manual

Product Manual

Product Manual