1, battery charging: when the product reads USB sound intermittently, or displays flashing, it means the voltage is not enough, the product needs to be charged to work normally. Charging method is: with a randomly equipped USB charging cable, plug the USB head into the COMPUTER USB port or the USB port on the phone charger, and plug the other end into the USB charging port of the machine to charge. Try charging for about ten minutes to check whether the unit can work normally. If it can work, it will be charged. Otherwise, it is not charged, and the charging line and connection state should be checked.
    2. The machine has functions: it can connect the mobile phone with Bluetooth, sing karaoke with KTV software APP, act as a microphone, record recording and play music as a Bluetooth speaker.
    3. Music playing: Turn on the phone with the default microphone function, and then use the mobile phone to connect the Bluetooth device to play the music in the mobile phone. Press the previous and the next to adjust the up and down switch and volume adjustment.
    4. External audio input: 3.5 stereo headphone plugs with random audio cable connected to mobile phone, MP3, MP4, MP5, tablet/desktop/laptop, game console, DVD/EVD or other audio devices; Can be played as an external loudspeaker function.
     6. Play/Pause key: Short press in the state of playing music to pause/play.

7. Function of microphone KARAOKE: Connect bluetooth YSD device with mobile phone, install any APP software such as Singing bar, national Karaoke, cool Dog music on mobile phone, open karaoke, you can choose the accompaniment mode in the software, and experience the KTV journey in your hand.