1, 5 buttons to control music play / pause, switch between previous / next song, adjust volume up / down.
2. It can be connected to the computer through the MINI-USB interface and used as a U disk to download MP3 songs directly from the computer.
3. SPI Flash and TF are used to store MP3 songs. Choose one of the two. When both exist at the same time, the TF card plays priority.
4. Onboard SPI Flash can realize related functions, which is more affordable.
5. With 3W external power amplifier.