Description 
The DFPlayer Mini MP3 Player is a small and low-cost MP3 module with a simplified output directly to the speaker. The module can be a stand-alone module with the attached battery, speaker and push buttons. It can also be used with an Arduino UNO or any other device with RX/TX capabilities. The DFPlayer perfectly integrates a complex decoding module, which supports common audio formats such as MP3, WAV, WMA and FAT16 and FAT32 file systems. This module includes a simple serial port for plug-and-play.

Features
Supported sampling rates (kHz): 8/11.025/12/16/22.05/24/32/44.1/48
24-bit DAC output, support for dynamic range 90dB, SNR support 85dB
Maximum support 32G of the TF card, 32G of U disk, 64M bytes NOR-FLASH
A variety of control modes, I/O control mode, serial mode, AD button control mode
Notification sound waiting for function, the music can be suspended. when the notification sound is over, the music continues to play.
Audio data sorted by folder supports up to 100 folders, every folder can hold up to 255 songs
It includes 30 levels of adjustable volume and supports 6 -level adjustable EQ.