Set the active microphone on your earphones in the Beats app for Android
On your Beats Fit Pro or Powerbeats Pro earphones, you can set which earbud’s microphone is active. You can also set the microphone to automatically switch to the other earbud when you remove an earbud.
In the Beats app for Android, tap , then tap My Beats to display the device screen.
Scroll down to Microphone, tap Automatic, then do any of the following:
Tap Automatically Switch Buds to automatically change the microphone between the left and right earbuds when you remove an earbud.
Tap Always Left Bud to assign the microphone to the left earbud.
Tap Always Right Bud to assign the microphone to the right earbud.