Wide voltage DC power supply: operates from 9 to 24 V DC, enabling compatibility with common power sources and reducing the need for multiple adapters. 9channel onetoone trigger interface: each channel can trigger a dedicated audio file, allowing up to 9 independent playback streams for precise multichannel setups. Low level trigger version with GND signal: supports direct use of a ground (GND) trigger, simplifying wiring with switches or sensors. MP3 and WAV decoding with up to 48 kHz sampling: supports widely used audio formats with standard quality playback, ensuring compatibility with typical audio assets. Use scenarios Museum or gallery installations: assign a separate audio track to each display; trigger sounds as visitors reach specific exhibits for an automated, hands experience. Retail or commercial spaces: run zonespecific background music or promotional audio in different areas of a store, using independent channels to tailor sound profiles. Stage events or exhibitions: cue music or sound effects for different scenes or setups with reliable, channelspecific triggers to synchronize with performances or displays.