1、The MP3 decoder module supports decoding many audio format, including MP3, MP3+V, WMA, WAV, MIDI, SP-MIDI. 2、The recording encoding format is IMA ADPCM (mono), and supports microphone and line input two input methods. 3、Supports MP3 and WAV streams, has internal phase-locked loop clock multiplier as well as low power consumption. 4、Equipped with stereo digital‑to‑analog converter (DAC), 16‑bit adjustable on‑chip analog‑to‑digital converter (ADC). 5、Has stereo earplug driver (30 ohms), separate analog, digital and IO power supplies, and serial data and control interface (SPI). 1 x MP3 Decoder Module Item Type: MP3 Decoder ModuleSPI Interface: Control signal lines are all led out. Output Interface: 1 headphone and audio output interface. Microphone: 1 microphone for recording. Input Interface: 1 line_in input interface. Power Indicator Light: YesCurrent: Onboard 3.3V and 2.5V LDO 1117, providing 800mA current. Single Power Supply: +5VDC, capacitor filter. Crystal Oscillator: 12.288 Mhz crystal oscillator. Printed Circuit Board Size: Approx. 50 x 40.5mm / 2 x 1.6in