Supported Sampling Rates (kHz): 8 or 11.025 or 12 or 16 or 22.05 or 24 or 32 or 44.1 or 48 24 -bit output, support for dynamic range 90dB, support 85dB. The DFPlayer perfectly integrates hard decoding module, which supports common audio formats such as MP3, WAV and WMA. Supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes NORFLASH. Control modes: I or O control mode, serial mode, AD button control mode. Through a simple serial port, you can play the designated music without any other tedious underlying operations. The DFPlayer Mini MP3 Player For is a small and low price MP3 module with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an for or any other with RX or TX capabilities Input Voltage: DC 3.2-5.0V 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 to 255 songs. 1. Car navigation voice broadcast 2. Multi-channel voice alarm or voice guidance equipment operation 3. Electric sightseeing bus with voice announcement 4. Electrical and mechanical equipment failure 5. Fire alarm voice prompts 6. Automatic broadcast equipment, regular broadcast Material:PCB colour:black Package Contents: 5 x Mp3 Player Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.