An MP3 player is a portable electronic device designed to play digital audio files, primarily in the MP3 format. These devices allow 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, headphone jacks, and sometimes even touch screens for easy navigation. Modern MP3 players can connect to computers and the internet, enabling users to download and transfer music easily. Some models also support various audio formats, such as WAV and AAC, and may include additional features like radio tuners and voice recording capabilities.