3PCS mp3 player board
This mp3 board module has both USB and full size SD card interface, stereo inputs and stereo outputs.
This compact circuit mp3 player board / mp3 decoder board module features highest quality stereo or mono output and operates on a standard 5V power supply, full circuit diagrams are enclosed
The mp3 player board includes dedicated controls for Play/Pause, Next/Previous track, and Volume +/- adjustment, along with auxiliary input/output connections for expanded functionality.
The integrated USB and SD card interfaces provide flexible media playback options, while the professional-grade decoder ensures clear, faithful audio reproduction.
Simple Operation
You may use push buttons to control it or use it without any processor or push buttons, just connect to power.
0.25W output power can drive 0.25W speakers or earbud or connect to a 10W-200W mono or stereo amplifier
it provides Continues play back and automatic play at power ON
Unlike other mp3 player boards this mp3 module fully memorizes its settings on a re-power so Vol+/Vol- stays at your desired level, No need to keep adjusting volume after a re-power
It memorizes the track playing and continues from that track on a re-power too
Aux inputs allows mixing other live audio streams into the current mp3 file being played
Fully supported via messaging for your circuit and operation questions
Product specifications:
Power range: 4.5V -5.5V
Dimension: 1.5 inch x 1.5 inch x 0.5 inch
MP3 sample rate: bit-rate 320 kbps
USB flash drive: 128MB to 64GB
Frequency response: 20Hz - 20KHz
2 Audio Channels

The board's thoughtful design incorporates both digital and analog ground isolation for optimal signal integrity.
Whether you're building a custom audio system or upgrading existing equipment, this decoder board delivers reliable performance and straightforward integration capabilities.
The board includes clear connection points for power, audio output, and control functions, making installation straightforward for both hobbyists and professionals