1. Large capacity 8MB memory, supports USB music download 2. Supports 3 playback modes with button-controlled operation 3. Compatible with ambient lighting, high-quality speakers, and adjustable volume 4. Rechargeable design with customizable audio content 5. Wide applicability for music-enabled applications including decorative walls, greeting cards, gift boxes, photo albums, and toys Power supply voltage: 4.2–5.2V Interface: USB Type-C (5V power supply / music download) Motherboard size: 49mm × 27mm Speaker size: 36mm diameter Button size: 23mm × 13mm Note: Ambient lighting can be added by soldering to the designated pads on the board—observe polarity during installation. Playback modes: - Loop playback: Press button once to start continuous playback from the beginning; press again to stop. - Single playback: Press button once to play the full audio file once and stop automatically; press again during playback to stop immediately. - Track selection: Press button once to play the current track; press during playback to skip to the next track. Color: As shown Material: Plastic + Metal Package contents: 1 × Voice module Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3cm.