A pair of headphones, also known as a HEADSET, is a device that allows the user to listen to audio from a variety of sources. It typically consists of two earpieces connected by a band or wire. The earpieces are connected to a signal source such as an audio amplifier, radio, CD player, or smartphone. Headphones provide a way for the user to privately listen to audio without disturbing others. They also allow the user to hear audio in environments where it would otherwise be difficult or impossible to do so.