Find lost Fitbit APP
With an approximate 100-foot range, you can use your phone to zero in on a misplaced band for as long as the Fitbit still has battery power. You don't need to "pair" the band with the app in advance, so you can download and try one of these apps even after losing your Fitbit.
this app support all models .
Disclaimer
Fitbit is a registered trademark and service mark of Fitbit, Inc. Finder for Fitbit Lite is designed for use with the Fitbit platform.