An MP3 플레이어 is a portable device designed to play digital audio files, primarily in the MP3 format. It allows users to store and listen to music, podcasts, and other audio content on the go. Many MP3 players come with features like built-in storage, rechargeable batteries, and the ability to create playlists. These devices can connect to computers for transferring music and often support various audio formats. Some MP3 players also include additional features such as FM radio, voice recording, and Bluetooth connectivity, making them versatile tools for enjoying audio entertainment.