DF Player Mini MP3 Player Music Sensor Audio Voice Module Compatible Development Board 1. DFPlayer Mini MP3 module, can be directly connected to speakers 2. Module with power supply battery, speakers, buttons can be used alone, can also be controlled through the serial port, as a module for Arduino UNO or any microcontroller with a serial port 3. The module itself integrates MP3, WAV, WMA hard decoding, while the software supports TF card driver, FAT16, FAT32 file system 4. Through a simple serial port command can be completed to play the specified music, and how to play music and other functions, without the need for cumbersome underlying operations, easy to use, stable and reliable 5. Weight: about 2.8g 6. Size: about 3 x 3cm Technical specifications: 1. Support sample rate (KHz): 811.025121622.05243244.148 2. 24-bit DAC output, dynamic range support: 90dB, signal-to-noise ratio support: 85dB 3. Fully support FAT16, FAT32 file system, support for 32G TF card, support for 32G U disk, 64M bytes of NORFLASH 4. Various control modes are available. IO control mode, serial port mode, AD button control mode 5. The broadcast language insertion function, you can pause the background music being played, the advertisement is played back to the background sound to continue playing 6. Audio data sorted by folder, support up to 100 folders, every other folder can be assigned 255 tracks 7. 30 levels of volume adjustable, 6 levels of EQ adjustable Applications: 1. Vehicle navigation voice announcement 2. Highway transportation inspection, toll booth voice prompts 3. Train station, bus station inspection voice prompts 4. Power, communication, financial business hall voice prompts 5. Vehicle in and out of the channel verification voice prompts 6. Border control channel voice prompts 7. Multi-channel voice alarm or equipment operation guidance voice 8. Electric sightseeing car traveling voice notification 9. Automatic alarm for electromechanical equipment failure 10. Voice alar