Large capacity 8MB memory, supports USB music download Supports 3 playback modes with button-controlled operation Equipped with high-quality speakers and adjustable volume Rechargeable design with customizable music playback Wide application for use in music walls, greeting cards, gift boxes, photo albums, toys, and more Power supply voltage: 4.2-5.2V Interface: TYPE-C (5V power supply/audio download) Motherboard size: 49mm x 27mm Speaker size: 36mm diameter Button size: 23mm x 13mm Note: Ambient lighting can be added; soldering must align with the silkscreen pads on the board, observing correct polarity Playback modes: - Loop playback: Press button once to start continuous playback from beginning; press again to stop - Non-loop playback: Press button once to play from beginning and stop automatically; press during playback to stop immediately - Next track playback: Press button to play one track and stop after completion; press during playback to skip to next track Color: As shown Material: Plastic + Metal Package includes: 1 set x Voice module Note: Other items not included. Lighting effects and display differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3cm.