Support VS1003 audio decoding format: MP3, MP3 + V, WMA, WAV, MIDI, SP - MIDI separate analog and digital and IO power supply; The serial data and control interface (SPI) 1 headphones and audio output interface, with the internal PLL clock frequency multiplier; stereo digital to analog converter (DAC); 16 the adjustable chip digital converter (ADC); stereo earplugs drives (30 o) 1 mic for recording, supports audio coding format: IMA ADPCM (mono) 1 line_in input interface, supports two input mode; Support MP3 and WAV flow a separate analog and digital and IO power supply, power light the onboard 3.3 V and 2.5 V "chip AMS - 1117, the largest current 800 mA single power supply: + 5 VDC, capacitor filter 12.288 Mhz crystal vibration colour:green Material:PCB size:4 x 4cm Package Contents: 2 x VS1053 MP3 Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.