You can control the audio volume with your earbuds by pressing the multi-function button on each side. A press and hold on the right earbud increases the playback volume and a press and hold on the left earbud decreases it.
To customize the functionality of your Jaybird Vista 2 earbuds multi-function buttons:
Download and install the Jaybird App.
Open the Jaybird App on your phone.
Navigate to ‘Button Controls’.
Please note, selecting the voice assistant will disable Volume controls (default).