Is this compatible with new B1381 Chamberlain led opener?

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.

Is this compatible with Chamberlain openers?

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.

Wiil this work on the Chamberlin B970?

NO, this will not work with the B970

How far does the box protrude laterally from the track? (e.g. what is the length of the plastic box with the bolt retracted?)

The box protrudes 7.200 from track. when in locked position the bolt protrudes .800 from inside surface of track

Liftmaster 841lm Automatic Garage Door Lock

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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C$15971

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Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

AUDIBLE LOCK CONFIRMATION - Hear the reassuring sound of your garage securing itself every time—peace of mind in every click.
OPTIMIZED DUAL SIDE DEFENSE - Add locks on both sides of your garage door for maximum protection against high winds and break-ins.
SEAMLESS AUTO LOCK INTEGRATION - Locks and unlocks automatically with your compatible LiftMaster opener for zero hassle.
ROBUST ALLOY STEEL CONSTRUCTION - Durable surface-mounted design built to withstand storms and deter intruders.
SMART SECURITY AT YOUR FINGERTIPS - Monitor and control your garage lock remotely via the MyQ app—never wonder if you forgot to lock up.

The LiftMaster 841LM Automatic Garage Door Lock is a surface-mounted alloy steel lock designed to work exclusively with select LiftMaster garage door openers (models 8550WL, 8587WL, 8360WL, 8500W). It automatically locks and unlocks in sync with your door opener, offers smartphone monitoring via the MyQ app, and provides audible confirmation of secure locking. Ideal for enhancing security and weather resistance, it supports dual-side installation for superior protection.

Specifications

ASIN	B074L9JQQR
Best Sellers Rank	#121,668 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #466 in Garage Door Keypads & Remotes
Brand Name	LiftMaster
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (228)
Exterior Finish	Stainless Steel, Silver
Global Trade Identification Number	00012381185740
Installation Type	Surface-mounted
Item Dimensions L x W x H	8.5"L x 4.5"W x 4.3"H
Manufacturer	Liftmaster/Chamberlain
Manufacturer Part Number	841lm & AOD Service Kit
Material Type	Alloy Steel
Model Number	841lm
Number of Pieces	1
Recommended Uses For Product	Securing and locking/unlocking a garage door in conjunction with a compatible garage door opener
UPC	757347279797 012381185740
Unit Count	1 Count

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C$15971

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Nicaragua.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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