Headphones are a type of personal electronic device that allow users to listen to audio privately, without disturbing others. These devices, which may be wired or wireless, typically consist of two small speakers that are placed over the user's ears. They are commonly used with computers, smartphones, music players, and other electronic devices. The category includes various designs such as over-ear, on-ear, and in-ear models, and may also encompass features like noise cancellation, built-in microphone, and high-resolution sound.