As the earbuds support Master/Slave switch, both of them can pair to your phone as a master device. When the right earbud is master, the Bluetooth name is Liberty Air 2, when the left earbud is master the Bluetooth name is Liberty Air 2-L. If you would like to use the left side only, please put the right side in the charging case and close the charging case cover. Select "Liberty Air 2-L" to pair.