Integrated I/O Segment Trigger UART serial port control playback of audio files, enabling seamless integration with your existing system. MP3 and WAV decoding support Supports MP3 and WAV decoding formats; memory up to 32Gbit 4MByte to store your music. Onboard 5W Class D megaphone circuit Builtin 5W Class D amplifier; capable of directly driving 4 Ohm 35W speakers for clear and powerful sound. USB update interface Can update stored audio files via a USB Micro download interface when connected to a computer. Use scenarios Public address and announcements in small venues, classrooms, or retail displays requiring reliable playback from a control system. Embedded system applications where UART control is available, enabling triggerbased playback from a microcontroller or controller board. Information kiosks, museums, or exhibit displays that need background audio or prompt playback with simple USBbased library updates.