Key benefits Precise, on-demand audio playback: nine independent trigger inputs let you play up to nine different tracks with a one-to-one mapping between trigger and audio file, simplifying control and automation. Built-in amplification for simpler installation: includes a 60W D power amplifier capable of directly driving 4–8 Ω speakers (recommended speaker power 20–60 W), removing the need for a separate amplifier in many applications. Easy content management: MP3 and WAV decoding with up to 48 kHz sampling rate, and a USB data connection for fast file replacement from a computer. Flexible integration: wide voltage input (9–24 V) and available high-level or low-level trigger versions to match different control systems. Key features and specifications Power input: wide-range 9–24 V DC. Trigger interface: 9-way one-to-one trigger interface, supports triggering up to 9 separate audio tracks. Trigger versions: available in high-level trigger version and low-level trigger version (choose the version appropriate to your control signals). Amplifier: includes a 60W D power amplifier, suitable for driving speakers with impedance of 4–8 Ω and rated power between 20–60 W. Audio formats and quality: supports MP3 and WAV decoding; supports audio file sampling rates up to 48 kHz. Storage: 64 MBit (8 MByte) built-in flash memory for audio files. File transfer: connect to a PC via USB data cable to add, remove, or update audio files. External indicator support: an external warning light can be connected; the warning light voltage must match the unit’s supply voltage (9–24 V as used). How it solves common problems Reduces system complexity by combining decoding, storage, and amplification in one unit, avoiding extra components. Provides reliable, isolated control of multiple messages or tones via dedicated trigger inputs—no need for external switching logic. Simplifies content updates via USB; no special software or network required. Offers compatibility with a wide range of control equipment through selectable trigger level versions and a wide DC supply range. Installation and compatibility notes Select the high-level or low-level trigger version to match your controller’s output levels. Ensure external warning light voltage equals the system supply voltage before connecting. Use speakers rated 4–8 Ω and within the 20–60 W power range for safe operation and proper amplifier loading. Power the unit with a stable 9–24 V DC source. Practical use scenarios Retail and public spaces: play different pre-recorded announcements or music stings at specific times or when triggered by events (e.g., door sensors, POS triggers). Industrial safety and process control: trigger safety warnings, evacuation messages, or status alerts from machinery PLC outputs; choose high- or low-level trigger version to match PLC signals. Transport and guided tours: control location-based audio prompts by triggering tracks from vehicle or exhibit sensors; drive onboard speakers directly without extra amplifiers. What makes this product stand out Integrated 9-way triggered playback plus a 60W D power amplifier reduces component count and wiring complexity. Direct USB file management and support for common audio formats (MP3/WAV, up to 48 kHz) simplify content updates. Wide 9–24 V supply and trigger-level options increase compatibility with diverse control systems. If you need multi-channel triggered audio playback with built-in amplification, flexible trigger compatibility, and straightforward file management, this unit provides a compact, self-contained solution.