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Difference between the 877MAX and the 877LM

The 877MAX is a backwards compatible keyless entry. It will function on any Chamberlain openers from 1993 forward. Also, the programming steps for the MAX are initiated by holding the * and # keys together, which is not the case for the LM.

The 877LM however is designed to work exclusively with the Security+ 2.0 garage door products. These units have a yellow learn button and 2 yellow antennas.


LiftMaster® Model 877MAX Wireless Keyless Entry Owner's Manual
LiftMaster® Keyless Entry 877LM Owner's Manual

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Difference between the 877MAX and the 877LM