1. Play/pause button, used to control the play and pause of music. Press the key to start or pause the music.

2. Volume plus and minus keys, used to adjust the volume. Press the volume up button to increase the volume; press the volume down button to decrease the volume.

3. Song switching key, used to switch to the next or previous song. Press the key and the player will switch to the next song; long press the key and the player will switch to the previous song.

4. Bluetooth connection key, used to connect Bluetooth devices. Press the key and the player will start searching for nearby Bluetooth devices and establish a connection.

5. Power switch, used to turn on and off the player. Press the button and the player will turn on; press and hold the button and the player will turn off.