### Product Features
1. Premium Sound Performance: Integrated 2W mono amplifier (delivers up to 3W output under 5V power) matches perfectly with recommended 4Ω 3W speakers. The gold-plated 3.5mm jack supports connection to headphones or external audio devices.
2. Versatile Power Supply: Equipped with a Micro USB port, it can be powered via mobile power bank, phone data cable, 3.7V lithium battery, or 5V USB power source, with a working voltage range of 3.7~5.5V.
3. Multiple Playback Modes: Supports TF card (max 16G tested) and USB flash drive (max 32G tested) playback. It defaults to TF card mode on startup, automatically switches to USB mode if no TF card is detected, and supports manual mode switching when both storage devices are inserted.
4. User-friendly Design: Solder-free speaker terminals allow for easy wiring, and the module is specially designed for easy modification. Its compact size is 45.6mm * 35.2mm, with a dual-board design and large-area copper coating for stable and reliable performance.
### Playback & Operation Tips
- Supports MP3 format, auto-plays on power on, red LED flashes during playback.
- Defaults to all-song loop mode on startup, press the Repeat button to switch between single-song loop and all-song loop.
- Button Functions:
* Prev/V--: Short press to switch to previous song, long press (approx 2s) to turn down volume
* Next/V++: Short press to switch to next song, long press (approx 2s) to turn up volume
* P/P/Mode: Short press to play/pause, long press (approx 2s) to switch between TF card and USB mode
* Repeat: Short press to switch loop modes, no long press function
### Notes
For USB flash drive mode, 5V power supply is recommended, as some USB flash drives do not support 3.7V power supply.
The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.
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