Model Compatibility:841LM garage door lock is compatible with LiftMaster residential garage door opener models 8550WL, 8360WL, 8580WL, 8587W, 8500W. The 841LM garage door 12V lock cannot be replaced with 24V lock accessories for jackshaft openers models 3800, 3900 and 8500.
Installation List：841LM Automatic Garage Door Lock*1, 1/4\"-20x1/2\" screws*2, 33ft (10m) connecting wire*1,user instruction manual *1. 12V Dedicated Voltage, Compatible with Garage Door Openers, Stable Power Supply for Smooth Auto Locking & Unlocking, No Circuit Jamming or Malfunctions.
Automatic synchronization of locking and unlocking: The 841LM garage door lock can be fully integrated with the matching garage door opener to achieve automatic linkage. When the garage door is opened, the lock automatically unlocks; after the door is closed, it is immediately locked. A crisp click sound will be heard when the locking is successful, making your travel more secure.
MyQ supports remote monitoring: It is compatible with the MyQ mobile control system, allowing you to remotely check the real-time status of the garage door lock at any time. At the same time, you can install two locks on each side to provide top-level protection, which can withstand strong winds and heavy rain.
Easy Installation & Reliable After Sales Service Plug and play design enables simple installation without complex wiring; only common household tools are needed for fast installation. We provide a 2 year warranty, and product exchange services are available under applicable conditions. Should you encounter any problems, please reach out to our support email. Our customer service team will respond within 24 hours.
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