Method one
Connect the phone to the speaker with an audio cable. Connect the phone to the speaker with an audio cable (some mobile phones do not have a 3.5mm headphone port, you need to use a USB adapter cable), insert the other end into the audio hole of the speaker, turn on the speaker switch, and start playing music.
Method 2
Connect your phone to your speaker with a USB cable. Open the phone USB debugging and speaker switch, then open the phone player, select the song, start playing.
Method 3
Bluetooth connection. If the speaker is a Bluetooth speaker, you can connect the speaker through the mobile phone Bluetooth, open the mobile phone [Bluetooth function], search the speaker through the mobile phone Bluetooth, match and finally connect.