Main Features:
- Module can be used alone with power supply battery， speakers， buttons， or is controlled through the serial port
- 24-bit DAC output， support dynamic range: 90dB; SNR support: 85dB
- Fully support FAT16， FAT32 file system， and support TF card 32G， 32G USB memory stick， 64M bytes of NORFLASH
- Multiple control modes: IO control mode， serial mode and AD keypad control mode