Wireless connectivity is now embedded into an enormous range of products. Wi-Fi, Bluetooth, cellular communications, GNSS, RFID, NFC and other radio technologies allow products to communicate, exchange data and interact with connected environments.
For manufacturers placing radio equipment on the European Union market, these capabilities bring specific regulatory responsibilities under Directive 2014/53/EU — the Radio Equipment Directive, commonly known as the RED.
RED compliance goes considerably beyond checking whether a radio transmitter operates at the intended frequency. Depending on the equipment, the conformity assessment may need to address health and safety, electromagnetic compatibility, effective and efficient use of radio spectrum and certain additional requirements applicable to particular categories or classes of radio equipment.
For connected radio products, cybersecurity, privacy and fraud-protection requirements have also become an increasingly important part of the European compliance landscape.
Navigate This Article
Explore RED scope, essential requirements, radio spectrum, EMC, safety, cybersecurity, harmonised standards, testing, conformity assessment and CE marking.
Understanding the Radio Equipment Directive
Directive 2014/53/EU establishes the European regulatory framework governing the placing of radio equipment on the Union market.
At its core, the RED is intended to ensure that radio equipment meets essential requirements concerning health and safety, electromagnetic compatibility and the effective and efficient use of radio spectrum.
The Directive applies to products that intentionally emit or receive radio waves for radio communication or radiodetermination, as well as certain products that require an accessory such as an antenna to perform those functions.
Which Products May Fall Under RED?
The enormous growth of wireless connectivity means RED now affects manufacturers across many industries.
Wi-Fi Equipment
Routers, access points, gateways and products incorporating Wi-Fi connectivity.
Bluetooth Products
Headsets, speakers, peripherals, sensors and other Bluetooth-enabled products.
Cellular Equipment
Devices incorporating mobile communication technologies such as LTE or 5G.
IoT Devices
Connected sensors, controllers, gateways and smart devices communicating through radio networks.
RFID & NFC
Readers and equipment using radio-frequency identification or near-field communication.
GNSS Equipment
Equipment using satellite-based radiodetermination functions such as GNSS receivers.
Wireless Industrial Equipment
Industrial controls, telemetry products, sensors and wireless monitoring systems.
Smart Home Products
Connected lighting, appliances, security products and building-control equipment.
Wearable Radio Equipment
Connected wearable products incorporating radio communication or radiodetermination functionality.
The RED Essential Requirements
Article 3 establishes the central essential requirements against which radio equipment is assessed.
Health & Safety
Radio equipment must protect the health and safety of persons and domestic animals and protect property, including the safety objectives associated with the Low Voltage Directive but without application of the LVD voltage limits.
Electromagnetic Compatibility
Radio equipment must provide an adequate level of electromagnetic compatibility as required through the relevant EMC essential requirements.
Radio Spectrum
Radio equipment must be constructed so that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference.
Additional Requirements
Particular categories or classes of radio equipment may be subject to additional essential requirements activated through EU legislation.
Effective & Efficient Use of Radio Spectrum
One of RED’s defining requirements is that radio equipment must be constructed so that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference.
Operating Frequency
The equipment’s intended frequency bands and radio configuration must be identified and assessed.
Transmitter Power
RF output characteristics should comply with applicable technical requirements and spectrum conditions.
Unwanted Emissions
Spurious and out-of-band emissions should be controlled to reduce the potential for harmful interference.
Receiver Performance
Applicable radio standards may include receiver characteristics important to effective spectrum use.
Antenna Configuration
Antenna type, gain, placement and permitted configurations can affect RF performance and established compliance.
Spectrum Access
Depending on the technology, mechanisms controlling access to the radio spectrum may form part of the technical assessment.
How RED Interacts With LVD & EMC Requirements
Radio equipment requires more than RF spectrum compliance. Article 3(1) incorporates important health, safety and electromagnetic compatibility requirements into the RED framework.
Safety
RED incorporates the safety objectives associated with Directive 2014/35/EU, but without applying the LVD’s voltage limits.
EMC
RED also requires an adequate level of electromagnetic compatibility through the essential requirements associated with Directive 2014/30/EU.
Consequently, low-voltage battery-powered radio equipment can still be subject to electrical and product-safety requirements even though its operating voltage would be below the normal LVD voltage range.
RED Cybersecurity, Privacy & Fraud-Protection Requirements
The regulatory scope of RED has expanded significantly for certain categories of connected radio equipment.
Commission Delegated Regulation (EU) 2022/30 activated selected Article 3(3) essential requirements for specified categories and classes of radio equipment. Following the amended application date, these requirements apply from 1 August 2025.
Article 3(3)(d) · Network Protection
Applicable radio equipment must incorporate safeguards intended to ensure that it does not harm networks or their functioning or misuse network resources in a way that causes unacceptable degradation of service.
Article 3(3)(e) · Privacy & Personal Data
Applicable equipment must incorporate safeguards to ensure that the personal data and privacy of users and subscribers are protected.
Article 3(3)(f) · Fraud Protection
Applicable radio equipment must support features intended to provide protection from fraud where the regulatory conditions apply.
Product Applicability
These requirements do not apply identically to every radio product. Manufacturers must determine which activated requirements apply to the specific category and functionality of their equipment.
Harmonised Standards Under RED
Harmonised European standards provide one of the principal technical routes for demonstrating conformity with RED essential requirements.
Where radio equipment conforms to applicable harmonised standards, or relevant parts of them, whose references have been published in the Official Journal of the European Union, the equipment benefits from presumption of conformity for the requirements covered by those standards.
Radio Spectrum Standards
Technology-specific EN standards can address transmitter, receiver and spectrum-utilisation characteristics.
EMC Standards
Appropriate standards address emissions, immunity and the electromagnetic behaviour of radio equipment.
Safety Standards
Product-specific safety standards can support demonstration of the applicable health and safety requirements.
Human Exposure
Applicable standards may address exposure to electromagnetic fields for equipment used close to or around persons.
Cybersecurity Standards
Applicable harmonised standards can support assessment against activated RED cybersecurity, privacy and fraud-protection requirements.
Product-Specific Standards
The correct standards depend on radio technology, frequency band, operating mode, product category and intended environment.
Radio Equipment Testing
RED testing should be defined around the actual radio technology, frequency bands, product configuration, antenna system, interfaces, intended environment and applicable essential requirements.
| Assessment Area | Typical Purpose |
|---|---|
| RF Output Power | Verification of transmitter characteristics and applicable limits. |
| Occupied Bandwidth | Assessment of the spectral characteristics of the transmitted signal. |
| Unwanted / Spurious Emissions | Evaluation of emissions outside the intended operating channel or band. |
| Receiver Characteristics | Assessment of relevant receiver performance where required by the applicable standard. |
| EMC Emissions | Evaluation of electromagnetic disturbances generated by the equipment. |
| EMC Immunity | Verification that the equipment can tolerate relevant electromagnetic disturbances. |
| Electrical / Product Safety | Assessment of applicable health and safety requirements. |
| RF Exposure | Evaluation of human exposure to electromagnetic fields where applicable. |
| Cybersecurity | Assessment of applicable security, privacy and fraud-protection requirements for affected equipment. |
Choosing the Correct RED Conformity Assessment Route
RED provides several conformity assessment procedures. The route available to the manufacturer depends in part on the essential requirements being assessed and whether applicable harmonised standards have been applied.
Module A
Internal Production Control may be used under the conditions established by the Directive, including where applicable harmonised standards covering the relevant requirements have been applied.
Modules B + C
EU-Type Examination by a Notified Body followed by conformity to type based on internal production control.
Module H
Conformity based on Full Quality Assurance, involving assessment and surveillance of the manufacturer’s approved quality system by a Notified Body.
Classify
Identify the equipment, radio functions and intended markets.
Map Requirements
Identify applicable Article 3 essential requirements.
Select Standards
Identify applicable harmonised standards and their OJEU status.
Select Route
Determine the appropriate conformity assessment procedure.
Test
Generate RF, EMC, safety and other required evidence.
Document
Compile the technical documentation and risk assessment.
Declare
Prepare and sign the EU Declaration of Conformity.
CE Mark
Complete marking and market-placement requirements.
Building the RED Technical Documentation
RED technical documentation should provide sufficient evidence to assess the radio equipment’s conformity with the applicable essential requirements.
EU Declaration of Conformity & CE Marking
Once conformity has been established through the appropriate assessment procedure, the manufacturer prepares the EU Declaration of Conformity and affixes the CE marking.
Product Identification
The equipment should carry appropriate type, batch, serial or other identification allowing traceability.
Manufacturer Information
Required manufacturer name and postal contact information must be provided.
EU Declaration
The manufacturer declares under its responsibility that the equipment complies with the applicable Union legislation.
CE Marking
The CE marking must be applied in accordance with the Directive and applicable general CE marking rules.
Radio equipment must also be accompanied by appropriate instructions and safety information. Information concerning frequency bands and maximum radio-frequency power transmitted in those bands must be provided as required by the Directive.
Common RED Compliance Failures
| Common Issue | Why It Creates Risk |
|---|---|
| Relying only on the radio module certificate | Integration into the final product can alter RF, EMC, exposure, antenna and safety characteristics. |
| Changing the antenna after testing | Antenna gain and characteristics can materially change radio performance and compliance. |
| Using outdated standards | The manufacturer may incorrectly assume presumption of conformity. |
| Ignoring receiver requirements | Spectrum compliance can involve more than transmitter output characteristics. |
| Testing only one radio mode | Other supported frequencies, bandwidths or operating configurations may represent different compliance conditions. |
| Firmware changed after testing | Software can alter RF power, frequency behaviour and other regulated characteristics. |
| Cybersecurity applicability overlooked | Applicable Article 3(3) requirements may remain unevaluated. |
| Incomplete EU Declaration of Conformity | Legislation, standards or product identity may not correspond with the marketed equipment. |
USB-C & Common Charger Requirements
The RED framework has also been amended to introduce common charging requirements for specified categories of rechargeable portable radio equipment.
For covered categories, the rules introduce USB Type-C charging requirements and associated charging-technology provisions intended to improve interoperability and reduce unnecessary charger waste.
Covered Product Categories
The requirements apply to specified categories of portable radio equipment rather than to every product within the RED scope.
USB Type-C
Covered equipment must comply with the applicable common charging receptacle and charging-technology requirements.
Charging Information
Manufacturers must provide the applicable information concerning charging characteristics in accordance with the amended RED framework.
Charger Bundling
The framework includes requirements enabling consumers to purchase covered radio equipment without a charging device where applicable.
From Wireless Functionality to Defensible RED Compliance
Adding wireless connectivity can transform both the functionality of a product and its regulatory obligations.
A successful RED compliance programme therefore begins with understanding the complete radio equipment: its frequencies, technologies, antennas, power levels, software, intended environment, users, network interfaces and foreseeable operating configurations.
The Testing Question
Does the representative equipment satisfy the applicable RF, EMC, safety, exposure and other technical test requirements?
The Compliance Question
Can the manufacturer demonstrate that the complete marketed radio equipment satisfies every applicable RED essential requirement?