Our guides separate manufacturer family listings, exact model confirmations, exclusions and unknown cases.
How this works
Editors record the issuing manufacturer, evidence scope, source URL and review date. We do not turn a marketplace description, similar-looking case or shared MHz value into a verified claim. Corrections are made against the original source and documented before republishing.
Questions or corrections
Write to vl-_-l@naver.com with a page URL and enough context to identify the issue. Never share a garage PIN or access code.
How a correction changes a page
A proposed update is compared with the manufacturer’s current page and its exact scope. If a source names only a protocol family, the text and finder rule continue to say family-level. An explicit exclusion overrides a general match. When a product is discontinued, the old documentation remains useful for education but its purchase prompt is removed. We also review nearby pages that may share the affected claim.
Official sources and review scope
These links support the claims on this page. Check your exact model and the manufacturer's latest revision before buying or programming.
- Learn button identification chart support.chamberlaingroup.com · checked 2026-11-04 · Button color/shape, technology, era, antenna; white square pre-1993 differs from white round 2025+