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; welding must follow the silkscreen pads on the board, observing correct polarity Playback modes: - Loop playback: Press once to start continuous playback from beginning, press again to stop - Non-loop playback: Press once to play from beginning and stop automatically; press during playback to stop early - Next track playback: Press to play next song; pressing during playback skips to next track Color: As shown in picture Material: Plastic and metal Package includes: 1 set x Voice module Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3cm.