HeyMelody is the software for firmware upgrade and function setting of OnePlus wireless headsets, as well as OPPO wireless headsets. You can quickly view battery levels of your left and right earbuds, modify the headset operation and headset firmware upgrade. Pairing your earbuds with your phone is a snap with Hey Melody. Notes: 1. If there is no related function after downloading the app, please update the App version and try again. 2. If your phone supported headset's feature settings in the phone setting you don't need to install the app.