Does anyone know which Fitbit this is? I don't have a charger for it!

[PreetiN]

[LZeeW]

Hello @PreetiN and welcome to the Community.  That device looks like a Charge 2.  If it is a Fitbit with the original band, you will see 'fitbit' in the watch band loop -- the piece where you tuck excess band.  If you remove the band and look at the pebble, you will see the Fitbit logo on one end.  You can download a Charge 2 manual from the Fitbit User Manual site.  The manual has instructions on how to operate those clips to remove the band.

You need to know that the Charge 2 was discontinued in 2018.  All rechargeable batteries have a lifespan and your battery might be dead.  Also, you must buy a third party charger.  Fitbit doesn't sell them.