Adjust the alert tone volume on your earphones in the Beats app for Android
The Beats Fit Pro and Powerbeats Pro earphones play different alert tones when connecting to (or disconnecting from) a device, when the battery is low, when switching between noise cancellation and transparency, and so on. You can change the volume of the alerts.
In the Beats app for Android, display the device screen.
Scroll down to Tone Volume, then drag the volume slider left or right.