Settings > Accessory Settings > Audio Device Settings

Audio Device Settings

Adjust settings for audio input / output devices.

Microphone Level Set the microphone volume.
Input Device Select the input device to use.
Output Device Select the output device to use.

Reconnecting the Bluetooth® headset

If the connection with a Bluetooth® headset is lost, you can re-establish the connection using the [Connect (Bluetooth®)] setting.

Settings > Accessory Settings > Audio Device Settings