This is VS1003 VS1003B MP3 Module Decoding Containing Microphones STM32 Module with complete MP3/WMA/MIDI audio decoder and ADPCM encoder which features a high-quality stereo DAC (Digital to Analog Converter), a 16-bit adjustable ADC (Analog to Digital Converter) and a high-quality stereo earphone driver (30 Ohm). This module is ideal for adding audio decoding and encoding capabilities to embedded systems. Features : Separate analog, digital, and IO power supply Serial data and control interface (SPI) 1 headphone and audio output interface 1microphone for recording, support audio encoding format 1 line input interface; supports MP3 and WAV stream Power indicator light Onboard 3.3 V and 2.5 V LDO chip AMS-1117, 12.288 MHz crystal Package Includes : 1 x VS1003 VS1003B MP3 Module. Category: Audio Module