How to connect Bluetooth to a multimedia active speaker?

Nowadays, multimedia active audio is generally equipped with Bluetooth function, and the signal source amplification is preferentially inserted into the USB flash drive. Under normal boot conditions, all Bluetooth devices work, but only the signal input conversion. When it is turned on normally, you can use the Bluetooth function of the mobile phone to search for multimedia Bluetooth. After the pairing is successful and the connection is confirmed, you can play the music on your mobile phone.