Wireless sets, also known as RADIOS, are electronic devices that allow users to receive and transmit audio signals without the use of wires. They are typically used for communication, entertainment, and information gathering purposes. RADIOS are composed of an antenna, a receiver, and a transmitter, which are all connected to a power source. The antenna captures radio waves, which are then converted into sound by the receiver. The transmitter then sends out the sound waves, allowing them to be heard by other RADIOS.