Supported Sampling Rates (kHz): 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48; 24-bit output, dynamic range up to 90 dB, SNR up to 85 dB. The DFPlayer Mini integrates a hardware decoding module and supports common audio formats including MP3, WAV, and WMA. Compatible with FAT16 and FAT32 file systems; supports microSD cards up to 32 GB and USB drives up to 32 GB; includes 64 MB NOR Flash memory. Control modes: I/O control, serial control, and analog button control. Music playback can be controlled via a simple serial interface without complex low-level programming. This is a compact, cost-effective MP3 module with direct speaker output. It can operate as a standalone device with a battery, speaker, and push buttons, or integrate with any microcontroller featuring RX/TX pins. Input Voltage: DC 3.2–5.0 V. Supports pause/resume functionality. Audio files can be organized in folders—up to 100 folders, each containing up to 255 tracks. Typical applications include: 1. Car navigation voice prompts 2. Multi-channel voice alarms or guidance systems 3. Electric sightseeing bus safety announcements 4. Equipment fault alerts 5. Fire alarm voice notifications 6. Scheduled automated audio broadcasting Material: PCB Color: Black Package Contents: 5 × DFPlayer Mini MP3 Player Boards Note: Color appearance may vary slightly due to lighting and screen settings. Dimensions may vary by ±1–3 cm.