Seeed Music Shield Arduino/Seeeduino, Arduino Mega, and Seeeduino Mega compatible 2 control-push buttons and 1 knob switch. I2S interface for external DAC Plays music from micro SD cards Decodes:MP3,WAV,MIDI,Ogg Vorbis Line In for recording in OGG format. Headphone/Line Out for playback Excellent sound quality with 1dB Frequency Response