MP3 module, voice module, music module

Features
1. Supports MP3 format, stereo audio output
2. Supports for 32Mb to 1GB of SD card.
3. Update MP3 files to SD card directly and easily
4. DAC 24bit/s stereo, 196KHz KHz audio decoder. 　
5. Powerful anti-jamming with stable performance
6. Play 10 different mp3 files by corresponding connected buttons/ switches