1. Large capacity 8MB memory, supports USB music download 2. Supports 3 playback modes, key controlled playback 3. Can be equipped with ambient lighting, speakers, and adjustable volume 4. Rechargeable, customizable music 5. Wide applicability, suitable for music cover walls, greeting cards, gift boxes, p o 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.