Features: 1. Exquisite and compact, portable hand strap design, easy to carry when going out. 2. IPX6 waterproof design, outdoor carnival without fear of rain. 3. Colorful RGB light effect, full of atmosphere. 4. New color combinations to create your own fashion style. 5. Support MP3 and WMA music files. 6. Supports TF card, Bluetooth, and file playback. 7. Supports external MP3/MP4/computer audio input function (aux). 8. Support 1+1 device serial port connection function.