Steve,
A old style battery operated media player can do exactly what your asking for and you may already have one onhand sitting in a junk drawer. I'm thinking of something like a Microsoft Zune, Apple iPod or a generic MP3 player.
Every media player I've seen can playback MP3, WAV and MP4a and other audio formats. Almost all also can playback a playlist of audio files.

Plug a cord into the media player headphone jack and never unplug it so you don't have to worry about the jack wearing out.

Make sure you install a fresh battery before every gig. 😁


Jim Fogle - 2026 BiaB (Build 1224) RB (Build 7) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home