You can program a total of 90 remotes. 50 remotes on channel 1 and 20 remotes each for channels 2 & 3.

Is this compatible with my q?

It USED to be compatible with MyQ. I had it configured for the last two years, working fine, and hooked up to Amazon Key for garage deliveries. Today, for unrelated security reasons, we had to reset all the remote codes on the 850LM and re-add them. Now the MyQ app will NO LONGER allow you to pair with the 850LM. It is not a technical limitation, it is a product marketing decision. I suspect they want to force people to shell out hundreds of dollars to upgrade their whole garage door system if they want internet access. It's a very lame decision by liftmaster to break something that was ALREADY WORKING.

Will this work on a power garage door with no remote, only interior push-buttons?

It's basically a set of buttons that can be remotely activated. Supports up to 3 buttons to control up to three 1-button openers or one 3-button opener. Supports both NC and NO type on channel 3 for stop buttons. Remote not included, just get a new liftmaster 3 button and it will work. I went with a 4-button remote, I control the 3 channels of this receiver for my shed and the 1 button opener on my attached garage with 1 remote.

Will this work with liftmaster 855lm homelink repeater? learn via yellow button on 850lm.

Yes it will, I just did it. You may have to press the Homelink button in your car a few times before the 850LM learns it. That's what I had to do.

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LiftMaster850LM Universal Gate and Garage Door Opener Receiver

Product ID: 355980974

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Details

Brand
LiftMaster
Colour
Grey
Connectivity technology
USB Ethernet
Item weight
45 g
Audio output mode
Stereo

📏Compact 15x12x7 cm design

📶Supports 90 remotes total

🔗3-channel multi-access

Description

🚪 Unlock effortless access with LiftMaster850LM — your gateway to smarter security!

SPACE SMART DESIGN - Sleek, compact form factor fits most gate and commercial door operators—efficiency meets style.
VEHICLE READY CONTROL - Multiple remote options let you open gates from the comfort and safety of your car—because convenience is king.
UNIVERSAL COMPATIBILITY - Works flawlessly with 811LM, 813LM, and all MAX remotes—no more device clutter.
TRIPLE CHANNEL POWERHOUSE - Manage up to 90 remotes seamlessly across three channels—ultimate control at your fingertips.
SECURE CONVENIENT ACCESS - Grant safe entry to gated communities and commercial sites with a single, reliable transmitter.

The LiftMaster850LM is a compact, universal gate and garage door opener receiver compatible with 811LM, 813LM, and all MAX remotes. It supports up to 90 remotes across three channels, providing secure, convenient access to gated communities and commercial sites. Designed with a sleek aluminum and plastic build, it fits most gate and commercial door operators and operates on 12V DC power.

Specifications

Part Number	850LM
Product Dimensions	15.24 x 12.7 x 7.62 cm; 45.36 g
Item model number	850LM
Colour	Grey
Material	Aluminum, Plastic
Voltage	12 Volts (DC)
Item Package Quantity	1
Certification	FCC Part 15
Included Components	Remote, Wally Receiver
Batteries included?	No
Batteries Required?	No
Item Weight	45.4 g

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