User's Manual

©2019 Fitbit, Inc. All rights reserved. Fitbit and the Fitbit logo are trademarks or registered
trademarks of Fitbit in the US and other countries. A more complete list of Fitbit trademarks
can be found at http://www.fitbit.com/legal/trademark-list. Third-party trademarks
mentioned are the property of their respective owners.
Wristband size
Wristband sizes are shown below. Note that accessory wristbands sold separately may vary
slightly.
Small
wristband
Fits a wrist between 5.5 - 7.1 inches (140 mm - 180 mm) in
circumference
Large
wristband
Fits a wrist between 7.1 - 8.7 inches (180 mm - 220 mm) in
circumference
Environmental conditions
Operating Temperature
14° to 113° F
(-10° to 45° C)
Non-operating
Temperature
-22° to 140° F
(-30° to 60° C)
Maximum Operating
Altitude
30,000 feet
(9,144 m)
Learn more
To learn more about your tracker and dashboard, visit help.fitbit.com.
Return policy and warranty
You can find warranty information and the fitbit.com return policy at fitbit.com/legal/returns-
and-warranty.