This compact MP3 module can be directly connected to the speaker. The module can be used alone, equipped with battery power, speakers and buttons, or controlled via serial port, as an Arduino UNO or any microcontroller module with serial port. https://elecena.pl/product/7560052/mini-mp3-player 2017-02-01 https://elecena.pl/product/7560052/mini-mp3-player 2025-12-17