1. VS1053 audio decoding module can play various music formats, and also supports OGG real-time encoding recording. 2. AVR processor is used for MP3 development, and SPI interface is reserved on the board for easy connection. SPI interface and lead out control signal 1 headphone and speaker output connector 1 microphone for recording 1 1ine_ In input interface Power indicator Working voltage: DC 5V, capacitor filtering The 3.3V and 1.8V LDO chip -1117 on the plate can 800mA current at Crystal oscillator operating frequency: 12.288MHz Interface : 3.5mm headphone interface : cartridge microphone for recording IN: input mode , used to select ADPCM recording source, If it is 0, the microphone input pin MICP and MICN are used, If it is 1, LINEIN is used SPI: SPI download connection Product size: 45 x 45mm color:Green Material:PCB Package Contents: 1 x VS1053 MP3 Board Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.