This product can play MP3 , supports TF card, USB download, has the advantages of small size, light weight, and simple operation. It can be connected to human infrared sensor module5 buttons, control music play/pause, switch up/down music, adjust volume up/downIt can be connected to a computer via Mini-USB, used as a U disk, and download MP3 directly from the computerSPI Flash and TF are used to store MP3 , choose one of the two, when they exist at the same time, TF card playback priorityWith 3W external power amplifier Due to different product batches, the appearance may be different, which does not affect use. material: plastic color: As Shown Package Contents: 1X Recording Box 1X Empty Battery Case 1X Recording Module 1X PIR sensor 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.