Usage Tips:1. Large capacity 8MB memory, supports USB music download 2. Supports 3 playback modes, key controlled playback 3. Can be equipped with ambient lighting, high-quality speakers, and adjustable volume 4. Rechargeable, customizable music 5. Wide applicability, suitable for music cover walls, greeting cards, gift boxes, photo albums, toys, etc Power supply voltage: 4.2-5.2V power supply Interface: TYPE-C (5V power supply/audio download interface) Motherboard size: 49mm x 27mm Speaker size: 36mm diameter Button size: 23mm x 13mm Note: Atmosphere lights can be added, and welding should be done according to the silk screen solder pads on the board, paying attention to the positive and negative poles. Play mode: Loop playback: the button once to start looping the stored music from scratch, and the button again to stop playback. Non loop playback: the button once to start playing the stored music from scratch and then stop. the button again during the playback process to stop playing. Next song playback: the button once to play music, stop after playing the music; Pressing the button during playback switch to track. Color: As Shown Material: Plastic+Metal Package Contents: 1 set * Voice module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.