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Fermion: DFPlayer Pro (Mini MP3 Player / 128MB Storage)

by DFRobot

A tiny USB-C MP3 player module with an even tinier onboard stereo amp and 128MB of onboard storage, suitable for standalone use.

You can control this MP3 player module via four modes: Arduino, AT command, on-board buttons, and ADKEY. The on-board button means you can play or switch music without having it attached to a controller and there's 128MB of storage you can fill with songs, sounds or music by connecting it to a computer via USB.

Hook it up to a pair of 3w speakers and make a very small MP3 player, soundboard or customised talking toy. You can even use it as a sound card for your PC or Raspberry Pi!


  • DF1201S Stereo Sound Chip with Serial Port
  • PAM8403 Mini Amplifier
  • On-board 128MB High-speed Storage (accessible via USB)
  • Playback Switch by Button
  • Dual-channel
  • Support analog U-disk
  • Programmable with Arduino IDE


  • DIY Plush Toys
  • Handmade Personalized Gift
  • Musical Alarm Clock
  • USB Sound Card


Power Supply 3.3V~5V
Operating Current >20mA
Storage 128MB
Audio Format MP3, WAV, WMA, FLAC, AAC, APE
Communication UART
Operating Temperature -20℃~70℃
Operating Humidity 5%RH~95%RH
Dimension 23 x 24.5mm / 0.91 x 0.96”



  • DFPlayer PRO - A MP3 Player x1
  • 2.54-6P Black Single-Row Pin x2