Key benefits Readytouse integrated audio playback and amplification: includes a 5W Class D amplifier so you can drive 3W–5W speakers directly without adding an external amp. quality file compatibility: decodes MP3 and WAV files with sampling rates up to 48 kHz, ensuring clear audio for music, prompts, and sound effects. Easy integration and control: UART asynchronous serialport control provides simple, reliable communication with microcontrollers, PLCs, or singleboard computers. Lowvoltage operation for portable and embedded designs: runs from 3.3–5.2 V DC (3.7 V and above recommended) to suit batterypowered and lowvoltage systems. What it does and why it matters Playback and drive in one module: the builtin 5W Class D amplifier eliminates the need for a separate amplifier stage, saving board space and reducing design complexity. Broad format and samplerate support: MP3 and WAV decoding at up to 48 kHz covers common audio formats used in products and prototypes, avoiding format conversion headaches. Serial control for automation and interactivity: the UART interface enables programmatic control from firmware—useful for automated announcements, interactive installations, and responsive devices. Core functions (via UART control) Play, pause Next / previous track Volume up / volume down EQ mode switching Direct song selection Play a specified path or file Insert and play a specified path Additional control commands available through the serial command set Key attributes Amplifier: 5W Class D integrated amplifier, suitable to directly drive 3W–5W speakers Decoding: MP3, WAV formats; supports audio sampling rates up to 48 kHz Control interface: UART asynchronous serial port for reliable command control Power: 3.3–5.2 V DC; recommended supply voltage 3.7 V and above Typical applications Portable and batterypowered audio devices: integrate into small speakers, toys, or handheld units where compact power and decoding matter. Embedded systems and IoT projects: connect to microcontrollers or singleboard computers to deliver prompts, status messages, or background music. Public information kiosks and displays: use UART control to automate announcements, trigger playback by events, or manage playlists from a host controller. Why choose this module Simplifies hardware design by combining decoding and amplification. Provides precise, programmatic control through a standard UART interface. Supports common audio formats and up to 48 kHz sampling for clear, reliable playback. Operates on lowvoltage supplies suitable for many embedded and portable applications.