Features: 100% Brand new and high quality. This is a compact and inexpensive MP3 module can be connected directly to the speaker. Module with battery power supply, speaker, keypad can be used alone, or through the serial port control, as for Arduino UNO or any microcontroller with a serial port module. The module itself perfectly integrated hardware decode MP3, WAV, WMA's. While the software supports TF card driver to support FAT16, FAT32 file system. Can be done by simple serial command plays the specified music, as well as how to play music and other functions, without tedious low-level, easy to use, stable and reliable. Specifications: 1. supports sampling rates (KHz): 8/11.025/12/16/22.05/24/32/44.1/48, 2. 24-bit DAC output, dynamic range support: 90dB, SNR support: 85dB, 3. fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes for NORFLASH, 4. a variety of control modes are available. IO control mode, serial mode, AD key control mode, 5. the broadcast language spots feature, you can pause the background music being played. Advertising finished playing back background sound to continue playing, 6. the audio data is sorted by folder, supports up to 100 folders, folders can assign every 255 Tracks, 7. 30 level adjustable volume, adjustable EQ 6. Application: 1, car navigation voice broadcast, 2, road transport inspectors, toll voice prompts, 3, train station, bus station voice prompts security check, 4, electric power, telecommunications, financial operating room voice prompts, 5, the vehicle into or out of the channel to verify the voice prompts, 6, border control channel voice prompts, 7, multi-channel voice alarm or voice guidance equipment operation, 8, electric sightseeing bus safety with voice notices, 9, electrical and mechanical equipment failure alarm, 10, fire alarm voice prompts, 11, automatic broadcasting equipment, regular broadcast