Basics: Project 065a MP3-TF-16P mini MP3 player module at Acoptex.com / ACOPTEX.COM
Mini Mp3 Player Module Tf Card U Disk Audio Voice Board For Arduino Uno Df Mp3-tf-16p Wholesale - Integrated Circuits - AliExpress
Arduino Sound Machine
MP3-TF-16P Serial MP3 Module DFPlayer Mini Serial MP3 Player Module
Amazon.com: AITRIP 6PCS Mini MP3 Player Audio Module MP3 Voice Decode Board DFPlayer with TF Card Slot, it can be Controlled Through Serial Port or I/O Port for Arduino,Raspberry Pi, AVR, MSP430,