DFPlayer Mini is a compact and cheap MP3 module that can be directly connected to speakers. Like Arduino or any microcontroller with a serial port module, the module with battery power, speaker, and keyboard can be used alone or controlled via a serial port. The module itself perfectly integrates MP3, WAV, and WMA hardware decoding. At the same time, the software supports TF card driver to support FAT16 and FAT32 file systems. It can be completed by a simple serial command, playing the specified music and how to play music and other functions, without dull bass, easy to use, stable and reliable. 1. Support sampling rate (KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48 2. 24-bit DAC output, support dynamic range: 90dB, support SNR: 85dB 3. Fully compatible with FAT16, FAT32 file system, maximum support 32G TF card, support 32G U disk, 64M byte NORFLASH 4. A variety of control modes are available. IO control mode, serial mode, AD key control mode 5. Language on-demand function, you can pause the background music being played. After playing the background with ads, the sound will continue to play 6. The audio data is sorted by folder, up to 100 folders are supported, and each folder can be assigned 255 audio tracks 7.30 level adjustable volume, EQ 6 adjustable application: 1. Car navigation voice transmission 2. Road transport inspector, toll voice prompt 3. Railway station, bus station; voice instructions for safety inspection. 4. Voice prompts in power, telecommunications, and financial operation rooms 5. The vehicle enters or exits the channel to verify the voice prompt 6. Voice prompt of edge control channel** 7. Multi-channel voice alarm or voice guidance equipment operation 8. Safety of electric tour buses with voice prompts 9. Mechanical and electrical equipment failure alarm 10. Fire alarm voice prompt 11. Automatic broadcasting equipment, regular broadcasting Package Included: 1 DFPlayer mini MP3 player module