FAQEU

RED FAQ Radio kits

Most radio construction kits intended for the EU market need a RED compliance path when the assembled product is radio equipment. The main carve-outs are narrow: amateur-radio kits not made available on the market and custom-built evaluation kits for professional R&D facilities.

Use this FAQ to separate covered construction kits from exempt evaluation boards and to document the facts, restrictions, and evidence behind the decision.

Author
Sorena AI
Published
May 9, 2026
Updated
May 27, 2026
Questions
4

Structured answer sets in this page tree.

Primary sources
3

Cited legal and guidance references.

Publication metadata
Sorena AI
Published May 9, 2026
Updated May 27, 2026
Overview

A radio kit is not automatically outside the Radio Equipment Directive. If a construction kit, when assembled according to its instructions, falls within the RED and is intended to be made available on the EU market, the kit manufacturer is responsible for compliance for that instructed assembly. Treat an evaluation board as potentially exempt only when it is custom-built, destined for professionals, used solely at research and development facilities, and used for R&D purposes.

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4 of 4 questions
Question 1

Are radio kits and evaluation boards covered by the RED?

Start with the market-placement facts. The Directive applies to radio equipment made available on the Union market, and the Commission RED Guide says construction kits are covered when the assembled kit falls within RED scope and is intended to be made available on the EU market.

A development board is different only if it fits the narrow Annex I evaluation-kit exclusion. The RED Guide describes this as a custom-built kit for a specific professional R&D customer or joint R&D project, with unique design characteristics that make it solely suitable for that project.

  • Covered: a repeatable radio construction kit marketed or supplied for assembly into radio equipment.
  • Potentially excluded: a custom-built evaluation kit for professional use solely at R&D facilities and for R&D purposes.
  • Also excluded from RED scope: radio kits for assembly and use by radio amateurs, but only where the amateur-radio equipment is not made available on the market.
Citations
Question 2

How to test the evaluation-kit exclusion

Do not call a board an evaluation kit just because it is unfinished, developer-focused, or sold with sample firmware. The RED Guide says all elements of the exemption must be met, including custom-built status, professional destination, sole use at R&D facilities, and R&D purpose.

The same guidance gives examples that do not benefit from the exemption: equipment used on a regular basis as laboratory equipment and generic evaluation equipment for users in R&D departments where the equipment is always the same and is not custom-built.

  • Identify the specific customer or joint R&D project that requested the board.
  • Show which unique design characteristics make the board suitable only for that project.
  • Restrict supply and documentation to professional R&D facility use, not general development, training, resale, production testing, or conformity testing.
Citations
Question 3

What evidence should be kept for radio kits?

For a covered construction kit, keep the RED evidence that proves the instructed assembly can meet the applicable essential requirements. At minimum, the file should identify the assembled configuration, antenna assumptions, software or firmware, instructions, applicable standards or other specifications, test evidence, conformity assessment route, EU declaration position, labelling, and market restrictions.

For an excluded custom-built evaluation kit, keep a shorter but explicit scope record. It should show why the kit is custom-built, who the professional R&D recipient is, where it may be used, what it may be used for, and what event would end the exemption, such as regular supply, generic sale, resale, or use outside the specific R&D purpose.

  • Record whether the kit is supplied commercially, free of charge, occasionally, or only under a project-specific R&D arrangement.
  • Keep the assembly instructions and the compliance assumptions together; the kit manufacturer remains responsible when the kit is assembled according to those instructions.
  • Reopen the file if the board becomes a standard catalogue item, the firmware or radio module changes, the antenna options change, or the intended user group expands.
Citations
European Commission - RED guide

Commission guidance on construction kits, custom-built evaluation kits, and use of component assessments in technical documentation.

Recommended next step

Turn the kit decision into a RED scope memo

Document whether the board is a covered construction kit, an amateur-radio kit outside market availability, or a custom-built professional R&D evaluation kit, then attach the evidence and review triggers.

Question 4

Common mistakes to avoid with RED kit decisions

The biggest mistake is treating every developer board as exempt. The exemption is not a general prototype, lab, or engineering-sample safe harbour; it is limited to custom-built evaluation kits for professional R&D facility use.

The second mistake is treating a kit as only a bundle of parts. If the assembled product is radio equipment and the kit is intended for the EU market, the instructions, supplied radio components, antenna choices, and intended assembly drive the RED assessment.

  • Do not rely on an internal label such as prototype, engineering sample, or evaluation kit unless the RED Annex I facts are documented.
  • Do not use a radio module certificate as the full kit conclusion; it may be useful evidence, but the assembled configuration still needs its own assessment.
  • Do not demonstrate non-compliant radio equipment at events unless the required visible notice and interference, disturbance, health, and safety measures are in place.
Citations
Primary sources

References and citations

eur-lex.europa.eu
Referenced sections
  • Binding RED source for free movement, event display conditions, market availability, and Annex I exclusions.
"visible sign clearly indicates"
single-market-economy.ec.europa.eu
Referenced sections
  • Commission guidance on trade-fair demonstrations, construction kits, custom-built evaluation kits, and component evidence limits.
"regular basis or there is a business related context"
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