This MP3 shield board is designed based on VS1053B from VLSI.using this shiled you can plug for / direcly as showing in pic,dont' need need to up with ,it's becomes more easy to play music compared with the tiny mp3 breakout board.VS1053 is a versatile MP3 codec processor is capable of decoding a variety of music formats, including Ogg Vorbis/MP3/AAC/WMA/MIDI audio.For the best headphone listening experience,the VS1053 includes EarSpeaker spatial processing whichaccurately simulates how a room with stereo loudspeakers would sound.In addition to being able to decode all major formats,VS1053 is capable of recording in Ogg Vobis file.With the TF card slot on the other side of the board,you can play mp3 files from TF card using this breakout.It is easily to drop it in your project or make a mp3 player using your microcontroller.Features Can play a variety of music formats,support for OGG encoding real-time recording SPI interface,the control signal lines are led out A headphone and stereo outputA microphone for recording A line_in input interface indicator 3.3V and 2.8V of LDO chip -1117 on board,provides up to 800mA currentA single supply: +5 12.288 Mhz crystal TF cart slot.Can play a variety of music formats, support for OGG encoding real-time recordingSPI interface, the control signal lines are led outA headphone and stereo outputA microphone for recordingA line_in input interface indicator3.3V and 2.8V of LDO chip -1117 on board, provides up to 800mA currentA single supply: +5 12.288 Mhz crystalTF card slotColour:redMaterial: PCBPackage Contents:1 x Development Board ModuleOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.