Music
You can control music playback on your paired smartphone using your Forerunner® device.
On a Forerunner 645 Music, you can download audio content to your device from your computer or from a third-party provider, so you can listen when your smartphone is not nearby. To listen to audio content stored on your device, you must connect headphones with Bluetooth® technology.
You can use the music controls to control music playback on your smartphone or to play music stored on your device.