The shape of a white LEARN button separates a modern Security+ 3.0 family from a legacy DIP design.
The difference that matters
These labels may look close on a marketplace listing, but the published technology or lifecycle is different. Compare the printed model code and opener system before ordering.
| Option | System or coverage | Decision note |
|---|---|---|
| White round | Security+ 3.0 | Use current white family chart |
| White square | Legacy DIP | Do not show modern white matches |
How to decide safely
Find the opener model and named technology in the official manual. An unlisted system stays unverified; a discontinued product stays informational. Neither a similar casing nor a shared MHz value proves compatibility.
What to inspect in a hard-to-see garage
Do not decide from a distant photo of a pale button. Look for the outline of the button itself and the printed opener model, then compare the antenna and year clues in the maker’s identification chart. A board replacement can complicate age guesses, so the manual and installed hardware matter more than a rough manufacture date. The finder intentionally returns unknown when white shape is missing.
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+