Amazon.com: Bluetooth MP3 Decoding Board, Golden^Li 12V Wireless Bluetooth Audio Remote Module Support TF SD Card/USB/FM Radio for Speaker or Other Appliances : Electronics
Mp3 Decoder Black Card Fm Digital Bluetooth Hot Selling Jr-g016b Car Audio 12v Player Suitable For Car And Home Radio - Car Mp3 Player - AliExpress
TF Card MP3 Decoder Board -- GPD2856A
ROHM offers a single-chip MP3 decoder LSI for USB/SD memory - EDN
MP3 Codec IC - VS1033D-L - COM-08127 - SparkFun Electronics
MP3 Decoder Board w/ Power Amplifier Module - TF Card/U Disk Support - ElectroPeak
Super-cheap MP3 decoder / FM radio module review - YouTube