This MP3 Player is an open-source one—it’s cheap and small. It supports multiple control modes, and you only need two buttons to use its basic functions. You can connect it directly to a speaker (3W or less) to play music.
The DY-SV17F is really easy to use. It supports multiple ways to operate—you can just plug it into a computer with a USB cable to download audio files, and it works with MP3 and WAV formats.
