A headphone is a device worn on or over the ears to listen to audio without disturbing others. It typically consists of two speakers connected by a band that rests on the head. Headphones can be wired, connecting to devices like smartphones or computers, or wireless, using Bluetooth technology for a cable-free experience. Headphones come in various styles, including over-ear, on-ear, and in-ear models, each offering different levels of comfort and sound isolation. They are commonly used for listening to music, watching movies, or making phone calls, providing a personal audio experience.