LiftMaster / Accessory reference

LiftMaster L991S

LiftMaster L991S: One-button remote for one LiftMaster Security+ 3.0 garage-door opener.

US source scopeUpdated 2026-09-12Independent Anderson reference

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Manufacturer identifier: L991S. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Denco supplier reference: RC L991Sh1; span.sku; Description bullets: one-button/one-opener Security+3.0 scope, range and myQ setup · checked 2026-09-12 · Denco

Values apply to the exact identifier and scope in the cited source.
Supplier-stated detail	One-button remote for one LiftMaster Security+ 3.0 garage-door opener. Denco supplier reference: RC L991Sh1; span.sku; Description bullets: one-button/one-opener Security+3.0 scope, range and myQ setup · checked 2026-09-12 · Denco
Supplier-stated detail	The supplier describes myQ app setup and management and a range of up to 1,300 ft when conditions permit. Denco supplier reference: RC L991Sh1; span.sku; Description bullets: one-button/one-opener Security+3.0 scope, range and myQ setup · checked 2026-09-12 · Denco
Selection limitation	Earlier protocol generations and exact opener models are not verified here. The app prerequisite from another remote cannot establish this remote’s requirements. Denco supplier reference: RC L991Sh1; span.sku; Description bullets: one-button/one-opener Security+3.0 scope, range and myQ setup · checked 2026-09-12 · Denco

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No direct successor for L991S is verified in this reference.

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Sources & scope

Denco supplier reference: RC L991SDenco · US · checked 2026-09-12

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

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