Features: 1. Large capacity 8MB memory, supports USB music download 2. Supports 3 playback modes, magnet controlled playback 3. Can be equipped with ambient lighting, high-quality speakers, and adjustable volume 4. Supports two control modes: start playing when the magnet approaches and start playing when the magnet leaves 5. Wide applicability, suitable for music cover walls, greeting cards, gift boxes, photo albums, toys, etc Parameter: Power supply voltage: 4.2-5.2V power supply Interface: TYPE-C (5V power supply/audio download interface) 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: Magnet leaving playback B version: 1. Loop playback: When the magnet leaves, start playing the stored music and continue to loop through all the music; Stop playing immediately when the magnet approaches during playback. 2. Non loop playback: When the magnet leaves, the stored music starts playing and stops after playing it all once; Stop playing immediately when the magnet approaches during playback. 3. Next song playback: The magnet leaves and starts playing. After the next song is played, it stops; Stop playing immediately when the magnet approaches during playback. All cables in the picture are of random colors, No specification accepted Color: black Material: PCB+Plastic Package Contents: 1 x Card movement module 1 x Speaker 1 x Switch module 1 x Magnet 1 x Power cord 1 x screwdriver 1 x Adhesive backing 1 x Battery 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.