Do these woek with Liftmaster Formula 1?

Liftmaster has an odd way of matching remotes to existing door openers. They are color coded. Look at the back of your garage door opener (the power unit) it should have a round button and two arrow or triangle shaped buttons. These buttons are color coded. Usually yellow or purple. The811LM remote controls work with the yellow buttons and yellow antenna wire. I hope this helps.

Are these compatable with the liftmaster la400 ul gate openers?

I do not know. Sorry. I got the name & model number off if the gate & then searched that info on Amazon.

does 811lm is the same as 891lm?

https://www.liftmaster.com/catalogresourcesv3/en-us/shared/files/generaldocuments/375utaccessorycompatibilitychart.pdf

Will this work for the 841LM?

Hi this is a Ideal for gated communities or commercial applications requiring a large number of remotes for a common entrance. Compatible only with Security+ 2.0® commercial receivers and operators. Thank you.

ASIN	B0192E64TK
Additional Features	Ergonomic
Battery Type	Alkaline
Best Sellers Rank	#12,931 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #70 in Garage Door Keypads & Remotes
Brand	LiftMaster
Color	Original version
Compatible Devices	Commercial Gate
Connectivity Technology	Infrared
Controller Type	Button Control
Customer Reviews	4.6 out of 5 stars 3,353 Reviews
Manufacturer	Liftmaster
Max Number of Supported Devices	1
Maximum Number of Supported Devices	1
Maximum Range	10 Meters
Model Name	811LM
Model Number	811LM 2 Pack
Number of Batteries	2 CR2 batteries required.
Special Feature	Ergonomic
UPC	641361643903

811LM with Security 2.0 Technology Remote Control, Pack of 2

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