<p>➀ The article introduces a compact FM radio designed to fit inside an earbud, using the RDA5807M IC for preset frequency tuning and volume control;</p><p>➀ The device can function as a basic single-channel FM radio or a long-range spy receiver when paired with a transmitter;</p><p>➂ The project involves programming the IC, assembling components (battery, speaker, and module) into an AirPods-style case, with future plans to integrate a microcontroller for advanced control.</p>