MP3 player

US /ˌem.piː.ˈθriː ˌpleɪ.ər/
UK /ˌem.piː.ˈθriː ˌpleɪ.ər/
"MP3 player" picture
1.

a portable electronic device that plays digital audio files, especially those in the MP3 format

:
She loaded her favorite songs onto her new MP3 player.
Before smartphones, MP3 players were very popular for listening to music on the go.