📻 A radio is a device that receives and broadcasts radio waves, allowing for the transmission of audio content over long distances. It typically consists of a tuner to select the desired frequency, an amplifier to boost the signal, and a speaker or headphones for listening. Radios have been used for entertainment, news dissemination, and communication since their invention in the early 20th century. They come in various forms, including portable radios, car radios, and digital radios, offering a wide range of programming options and connectivity features.