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Turn on device lock
To help keep your Fitbit watch secure, turn on device lock in the Fitbit app, which prompts you to enter a
personal 4-digit PIN code to unlock your watch. If you set up Fitbit Pay to make contactless payments
from your watch, device lock is turned on automatically and you’re required to set a code. If you don’t
use Fitbit Pay, device lock is optional.
Turn on device lock or reset your PIN code in the Fitbit app:
From the Fitbit app dashboard, tap or click the Account icon ( ) > FB504 & FB505 tile > Device Lock.
For more information on how to use device lock, see help.fitbit.com.
Change the wristband
FB504 & FB505 comes with a large wristband attached and an additional small wristband in the box. The
wristband has two separate bands (top and bottom) that you can swap with accessory bands sold
separately. For wristband measurements, see Wristband size.
Remove a wristband
To change the wristband, first remove the band attached to the watch. Then follow the steps below to
attach a new wristband.