9-Channel Voice Trigger MP3 Player – Car Alarm & Sound Module

9-Channel Trigger MP3 Sound Prompter & Alarm Module

Take full control of your audio alerts with this versatile 9-Channel Voice Trigger MP3 Player. Designed for automotive and industrial applications, this compact module lets you assign up to 9 unique audio tracks to independent trigger inputs — perfect for car reverse warnings, door chimes, alarm sirens, industrial safety prompts, and more. Made in Mainland China.

Why You'll Love It

• Dual Voltage Flexibility: Operates on DC 5V or DC 6–35V, making it compatible with a wide range of power environments — from USB-powered setups to full 12V/24V vehicle systems.
• 9 Independent Trigger Channels: Each channel plays its own dedicated audio file on demand via a simple low-level (short-circuit) signal trigger — ideal for one-to-one voice prompt mapping.
• Easy Custom Audio Upload: Connect via USB cable to any computer; the device is recognized as a USB flash drive. Simply drag and drop your MP3 or WAV files — no special software needed.
• Built-in 32Mbit (4MB) Flash Storage: Stores your custom audio files directly on the module with support for MP3 and WAV formats at up to 48KHz sampling rate for crisp, clear sound.
• 3W Waterproof Speaker Included: The onboard speaker delivers loud, penetrating sound suitable for both indoor and outdoor environments, even in wet or dusty conditions.
• 8 DIP Switch Trigger Modes: Configure playback behavior with 8 selectable trigger modes using the onboard DIP switch — tailor the system precisely to your application.
• Adjustable Volume: Use the built-in potentiometer to dial in exactly the right volume level for your environment.

Technical Specifications

• Working Voltage: DC 5V or DC 6–35V (selectable)
• Working Current: 1A and above
• Output Power: 3W (MAX)
• Frequency Response: 500Hz – 16KHz
• Storage: 4MB (32Mbit) built-in flash
• Supported Formats: MP3, WAV (max 48KHz sampling rate)
• Trigger Mode: Low-level signal (signal line shorted to power negative)
• Speaker: 3W waterproof

How to Upload Custom Audio

1. Open the device casing to access the USB port.
2. Connect to your computer using a data-capable USB cable — the device will appear as a USB flash drive.
3. Copy your audio files directly into the root directory. File names must be 5-digit numbers (e.g., 00001.mp3).

Note: Use a data USB cable, not a charge-only cable. Audio files must be stored in the root directory for one-to-one trigger playback to work correctly.

What's in the Box

• 1× Voice Prompt/Trigger MP3 Player Module (with 3W waterproof speaker)

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Frequently Asked Questions

Q: What types of vehicles or systems is this 9-channel trigger MP3 player compatible with?

A: This module supports DC 5V to 35V input, making it compatible with virtually any 12V or 24V vehicle electrical system (cars, trucks, forklifts) as well as USB-powered (5V) setups like Raspberry Pi or Arduino projects. It works anywhere you need triggered audio alerts or voice prompts.

Q: Can I use my own custom voice recordings or alarm sounds?

A: Absolutely! Simply connect the device to your computer via a data USB cable — it appears as a USB flash drive. Copy your MP3 or WAV audio files (named as 5-digit numbers, e.g., 00001.mp3) into the root directory, and each file is assigned to its corresponding trigger channel. It's quick and requires no special software.

Q: How does the trigger system work?

A: Each of the 9 channels is triggered by a low-level signal — meaning a short circuit between the signal wire and the negative pole of the power supply activates playback on that channel. This makes integration with relays, switches, motion sensors, or microcontroller outputs straightforward and reliable.

Q: Is the speaker weatherproof for outdoor automotive use?

A: Yes. The included 3W speaker is waterproof, making it well-suited for outdoor mounting on vehicles or in environments where exposure to moisture is a concern. Its strong sound penetration ensures the alert or prompt is clearly audible even in noisy surroundings.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.