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LiftMaster 821LM
MyQ / internet gateway era accessory — confirm vs newer MyQ bridges; not a remote replacement for 81LM.
Fitment facts
| Field | Value |
|---|---|
| Brand | LiftMaster |
| SKU | 821LM |
| Role | MyQ / internet gateway accessory |
| Protocol | LiftMaster/Chamberlain learn-button eras (Billion Code / Security+ / 2.0) |
| Often confused with | 828LM, CIGBU, remotes |
| Hard stop | Gateway ≠ visor remote; opener compatibility is Wi-Fi/MyQ specific |
| Confirm | Opener MyQ readiness + app generation |
Hard stop
Gateway ≠ visor remote; opener compatibility is Wi-Fi/MyQ specific
Before you buy
- Hard stop: Gateway ≠ visor remote; opener compatibility is Wi-Fi/MyQ specific
- Confirm: Opener MyQ readiness + app generation
- Often confused with: 828LM, CIGBU, remotes