This MP3 voice playback module gives you flexible, reliable audio playback with simple controls and easy integration into projects and systems. Key benefits Fast, direct triggering: Play any of 9 stored tracks immediately using the nine dedicated trigger ports. Each port accepts a low 0V (GND) trigger for straightforward hardware control—no programming required for basic playback. Flexible On Demand control: Access up to 31 MP3 files with the On Demand function. Use the direct triggers for simple playback or connect a microcontroller to expand control, sequence tracks, or combine audio with other actions. Hassle-free setup and operation: Built-in TF socket, 5 mm audio jack, speaker interface, volume control and micro USB socket let you get audio running quickly with common connectors and media. Broad compatibility: Works with a wide range of devices and systems, making it suitable for industrial control panels, interactive displays, embedded projects, alarms and more. What you get (functions and interfaces) 9 direct trigger ports for immediate playback via low 0V/GND signals On Demand support for 31 MP3 songs, controllable with a microcontroller TF card socket for storing MP3 files 5 mm audio output and dedicated speaker interface Manual volume control Micro USB socket for power or file transfer Practical use scenarios Retail or information kiosks: Play pre-recorded product messages or directions with a single trigger or automated sequence tied to sensors. Interactive exhibits and displays: Trigger narration or sound effects from multiple stations using simple low-voltage switches or integrate with a microcontroller for timed sequences. Security and automation: Add voice alerts, status announcements, or chimes to alarms, door systems, or industrial controllers without complex audio systems. Reliable, straightforward, and easy to integrate, this MP3 voice playback module is designed for projects and systems that require clear, selectable audio playback with minimal setup.