User's Manual

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Restart, Erase, and Update
Some troubleshooting steps may ask you to restart your watch, while erasing it is
useful if you want to give FB415 to another person. Update your watch to receive
any new Fitbit OS updates.
Restart FB415
To restart your watch, press and hold the button for a few seconds until you see
the Fitbit logo on the screen
Restarting your watch reboots the device but does not delete any data.
Erase FB415
A factory reset erases all apps and personal data from FB415. If you want to give
FB415 to another person or wish to return it for a refund, first complete a factory
reset:
On FB415, open the Settings app ( ) > About > Factory Reset.
Update FB415
We make free feature enhancements and product improvements available through
OS updates. We recommend keeping FB415 up to date.
When an update is available, you'll see a notification in the Fitbit app prompting
you to update. When the update starts, a progress bar appears on FB415 and in
the Fitbit app until the update is complete. For best results, make sure your watch
is charged.
Troubleshooting
If your watch is not working properly, review our troubleshooting guidance below.
Visit help.fitbit.com for more information.
Heart-rate signal missing
FB415 continuously tracks your heart rate while you're exercising and throughout
the day. Occasionally, the heart-rate sensor on your watch may have difficulty
finding a good signal. When this happens, you'll see dashed lines where your
current heart rate usually appears.