10
You can also use the Sync Now option in the app at any time.
Wear FB504 & FB505
Place FB504 & FB505 around your wrist. The side of the watch marked with “fitbit” should be on the
bottom of your wrist. If you need to attach the small wristband instead of the large one, or if you
purchased an accessory wristband, you’ll find instructions on how to change the wristband in Change the
wristband.
Placement for all-day wear vs exercise
When you’re not exercising, wear FB504 & FB505 a finger’s width below your wrist bone.
For optimized heart-rate tracking while exercising, keep these tips in mind:
Try wearing FB504 & FB505 higher on your wrist during exercise for an improved fit and more
accurate heart-rate reading. Many exercises such as bike riding or weight lifting cause you to
bend your wrist frequently, which could interfere with the heart-rate signal if the watch is lower
on your wrist.
Make sure the watch is in contact with your skin.
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