DFplayer MP3 player on a Mega Arduino - Audio - Arduino Forum
Amazon.com: 3PCS Mini MP3 Player Audio Module MP3 Voice Decode Board TF Card U Disk IO/Serial Port/AD Board DFPlayer Audio Voice Music Module for Arduino : Electronics
SparkFun MP3 Player Shield - DEV-12660 - SparkFun Electronics
Mini MP3 Player for Arduino
Arduino MP3 shield board with TF card - Geeetech Wiki
Amazon.com: SparkFun MP3 Player Shield- MP3 decoder- Turn Any Compatible with Arduino Board into a Fully Functional MP3 Player- 3.5mm Audio Out Jack- 0.1" Spaced Header for Speaker Out- microSD Card Slot :