When using a Forerunner^® 645 Music device connected to headphones using Bluetooth^® technology, the signal is strongest when there is a direct line of sight between the device and the antenna on the headphones.

• If the signal passes through your body, you may experience signal loss or your headphones may become disconnected.

• It is recommended to wear your headphones with the antenna on the same side of your body as your Forerunner 645 Music device.