---
product_id: 392057387
title: "841LM Automatic Garage Door Lock"
brand: "liftmaster"
price: "2610.86 DT"
currency: TND
in_stock: true
url: https://www.desertcart.tn/products/392057387-841lm-automatic-garage-door-lock
store_origin: TN
region: Tunisia
---

# Smartphone monitoring Auto-lock/unlock sync Dual lock storm defense 841LM Automatic Garage Door Lock

**Brand:** liftmaster
**Price:** 2610.86 DT
**Availability:** ✅ In Stock

## Summary

> 🔐 Elevate your garage security—because your peace of mind deserves smart protection.

## Quick Answers

- **What is this?** 841LM Automatic Garage Door Lock by liftmaster
- **How much does it cost?** 2610.86 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/392057387-841lm-automatic-garage-door-lock)

## Best For

- liftmaster enthusiasts

## Why This Product

- Trusted liftmaster brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Auto-Security:** Locks and unlocks automatically with your garage door opener for zero hassle.
- • **Tailored Compatibility:** Designed exclusively for select LiftMaster openers ensuring perfect integration.
- • **Smartphone Peace of Mind:** Monitor your garage lock status anytime via the MyQ app—security in your pocket.
- • **Storm-Ready Dual Defense:** Add locks on both sides of the door to withstand high winds and deter intruders.
- • **Audible Lock Confirmation:** Hear the reassuring click that your garage is securely locked every time.

## Overview

The LiftMaster 841LM Automatic Garage Door Lock is a 12V screw-in deadbolt that automatically locks and unlocks in sync with compatible LiftMaster garage door openers (models 8550WL, 8587WL, 8360WL, 8500W). It offers audible confirmation of locking, smartphone monitoring via the MyQ app, and enhanced security against storms and intruders when installed on both sides of the door.

## Description

841LM Automatic Garage Door Lock

## Features

- The 841LM works automatically with your garage door opener so it always locks and unlocks with every operation of the door.
- The model 841LM 12V lock is only compatible with the following garage door opener model numbers: 8550WL, 8587WL, 8360WL, 8500W.
- It is not interchangeable with the 24V lock used on residential jackshaft garage door opener models 3800, 3900 and 8500.
- Add a lock to each side of the door for the best defense against high winds and storms and intruders

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Installation Type | Screw-In |
| Recommended Uses For Product | Securing and locking/unlocking a garage door in conjunction with a compatible garage door opener |
| UPC | 757347279797 012381185740 |
| Global Trade Identification Number | 00012381185740 |
| Number of Pieces | 1 |
| Manufacturer | Liftmaster/Chamberlain |
| Item model number | 841lm |
| Product Dimensions | 21.59 x 11.43 x 10.92 cm; 1.36 kg |
| ASIN | B074L9JQQR |

## Product Details

- **Material:** Alloy Steel
- **Brand:** LiftMaster
- **Colour:** Black
- **Exterior Finish:** Steel
- **Product Dimensions:** 21.6L x 11.4W x 10.9H Centimeters

## Images

![841LM Automatic Garage Door Lock - Image 1](https://m.media-amazon.com/images/I/414Nl84FrcL.jpg)

## Questions & Answers

**Q: Is this compatible with new B1381 Chamberlain led opener?**
A: Yes it is. I purchased the B1381 in Dec 2019 and it has the security shield symbol on the cover ( it is a shield with half light and half dark divided diagonally). It also has two lock connectors on the unit next to the up and down adjustment buttons close to where you connect the wires for the sensors and control panel and the WiFi learn button. Since it has two lock connectors if you want you can connect two of these locks, one on each side of your door.

**Q: Is this compatible with Chamberlain openers?**
A: It is compatible with at least some some Chamberlain openers.  Liftmaster and Chamberlain are the same company. To know if yours is compatible the two requirements are for it to have the shield symbol on the cover and for there to be two lock connectors on the unit next to the up and down adjustment buttons. I have the Chamberlain B1381 and it is compatible.

**Q: Wiil this work on the Chamberlin B970?**
A: NO, this will not work with the B970

**Q: How far does the box protrude laterally from the track? (e.g. what is the length of the plastic box with the bolt retracted?)**
A: The box protrudes 7.200 from track. when in locked position the bolt protrudes .800 from inside surface of track

## Frequently Bought Together

- Liftmaster 841LM Automatic Garage Door Lock
- LIFTMASTER 8900W Light-Duty Commercial JACKSHAFT Operator W/Built-in WI-FI for SECTIONAL Doors LJ8900W
- New LiftMaster 485LM Battery Backup for Garage Door Openers 3840 3850 8360 8550

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**Shop now:** [https://www.desertcart.tn/products/392057387-841lm-automatic-garage-door-lock](https://www.desertcart.tn/products/392057387-841lm-automatic-garage-door-lock)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-01*