DC 9-24V wide voltage power supply 9-channel one-on-one trigger interface Supports low-level triggering for up to 9 audio tracks Uses GND as the trigger signal Supports MP3 and WAV audio decoding Audio file sampling rates up to 48 kHz TF card support (up to 32 GB), formatted in FAT32 Micro-USB socket for connecting to a PC to transfer audio files Built-in 30W Class D power amplifier Directly drives 4–8 ohm, 10–30W speakers Supports connection of external warning lights; output voltage matches input voltage DIP switch with 8 selectable trigger modes Potentiometer and push-button for volume adjustment Module size: 76 × 58 mm 3-bit red toggle switch for selecting 8 different trigger modes; power cycle required after mode change Light/Alarm output: output voltage matches input voltage; compatible with alarm or warning lights Two status indicators: green (power on), red (audio playback) Color: Black Material: ABS Model: L30TK Package includes: 1 × Audio player with integrated power amplifier Note: Color appearance may vary slightly due to lighting and screen settings. Dimensional tolerance: ±1–3 cm.