The difficult RED scope calls are usually not labelled products such as phones or routers; they are receivers, modules, kits, antennas, infrared equipment, wired devices with embedded radio functions, and products that use electromagnetic waves for a non-radio purpose. The RED Guide treats these as fact-specific cases rather than one-word categories.
Examples from Commission guidance include radio and television receivers within scope, equipment operating below 9 kHz within scope, radiodetermination equipment within scope, active antennas within scope, passive antennas sold alone generally outside RED, pure DVB-C receivers outside RED, other DVB receivers in scope, and construction kits in scope when the assembled product is intended to be made available on the Union market.
A radio module can help the manufacturer reuse test evidence, but it does not settle the host product's RED status or conformity. The party placing the finished equipment on the Union market must assess the final combination, including the module's installation, antenna, enclosure, power supply, software, other radio interfaces, intended use, and any conditions or limitations in the module evidence.