Features: This MP3 decoders module with serials port control delivers high fidelities sound playback and low power consumption, supporting multiple protocols like UART and I2C for seamless integration into smart devices. Engineered with professional sound decoding technology and modulars design, the circuit board enables distortionfree sound reproduction while minimizing energies usage through advance power management. for electronics engineers, iots developers, and creators requiring sound solution in industrial automation, smart home systems, or portable sound equipment projects. Optimized for public address systems, voice guided machinery, and energies efficient digital signage, its space saving structure simplifies installation in devices with limited cabinet space. for MP3/WAVs formats and multiple control interfaces, this sound playback module eliminates format conversion hassles while maintaining stable performances across temperature variations. Specifications: Materials: electronic components Size: 5x5cm Styles: S20F Standard Edition, S20F Welded terminals Edition, S20F relays Edition, S20F relays with terminals Edition, S20F Development (optional) Package Includes: 1PC Voice Playback Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.