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 4–8 Ω, 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; S1–S7 functions are grounded. 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. Dimensional tolerance: ±1–3 cm.