To connect to A3 Bluetooth, you first need to turn on A3's Bluetooth function. Then search for nearby Bluetooth devices on your phone or computer, find and select the Bluetooth name \"A3\".
If A3 needs to enter a pairing code, ensure that the correct pairing code is entered, usually 0000 or 1234.
Next, your phone or computer will prompt you if you want to allow the connection, and tap \"Allow\" to complete the pairing process. If the pairing is successful, you will receive a notification that the Bluetooth connection is successful. At this point you can connect the A3 via Bluetooth and use it happily.