Features: 1. 9–24V wide voltage power supply; 9-way one-to-one trigger interface, supporting up to 9 tracks; available in high-level and low-level trigger versions. 2. Supports MP3 and WAV audio decoding formats; supports audio file sampling rates up to 48 kHz; connects to a computer via USB data cable for audio file updates; includes 64 Mbit (8 MB) flash storage. 3. Built-in 60W Class D power amplifier, capable of directly driving 4–8Ω, 20–60W speakers. 4. Supports connection of an external warning light; the warning light voltage must match the power supply voltage. 5. DIP switch for selecting 8 trigger operating modes; volume potentiometer for volume adjustment; optocoupler isolation (high-level version). Model: MP3 Player Module C-L50FK Notes: 1. After adjusting the DIP switch settings, power must be cycled to activate the new configuration. 2. For MP3 mode applications, the low-level trigger version is recommended; terminals S1–S7 function as ground connections. 3. In insertion mode, background music files must be stored in the root directory, while insertion music files must be placed in the “CHABO” folder. Dimensions: 9.54 × 6.24 cm Material: PCB Color: White Package Contents: 1 × MP3 Player Module 1 × Data Cable 1 × Screwdriver Note: Color appearance may vary slightly due to lighting conditions and display settings. Measurement tolerance: ±1–3 cm.