Description of DFPlayer Mini MP3 Player Module DF Player Mini is a compact and inexpensive MP3 module that can be directly connected to speakers.The module can be used alone with the power supply battery, speaker, and buttons, or can be controlled through the serial port, as a module of UNO or any single-chip microcomputer with serial port.The module itself perfectly integrates the hard decoding of MP3, WAV, and WMA. At the same time, the software supports TF card drive and supports FAT16 and FAT32 file systems.Through simple serial port commands, you can complete the functions of playing the specified music and how to play the music. There is no need for tedious low-level operations, easy to use, stable and reliable. Features: Supports playback switching at the touch of a button Support up to 32GB TF card driver Support MP3, WAV, WMA audio formats High support for 48KHz sample rate and 24-bit DAC output can be output to provide high-quality audio playback effect. Applications: Car navigation voice broadcast; Road transport inspectors, toll stations voice prompts; Railway station, bus safety inspection voice prompts; Electricity, communications, financial business hall voice prompts; Vehicle into and out of the channel verify that the voice prompts; The public security border control channel voice prompts; Multi-channel voice alarm or equipment operating guide voice; The electric tourist car safe driving voice notices; Electromechanical equipment failure alarm; Fire alarm voice prompts; The automatic broadcast equipment, regular broadcast. Specification: 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 Fully supports FAT16, FAT32 file system, maximum support 32G of the TF card, support 32G of U disk, 64M bytes NOR FLASH A variety of control modes, I/O control mode, serial mode, AD button control mode Advertising sound waiting function, the music can be suspended. when advertising is over in the music continue to play Audio data sorted by folder supports up to 100 folders, every folder can hold up to 255 songs 30 level adjustable volume, 6 -level EQ adjustable