Ace 2 clock face

[Fvanhove]

How do It get the display that you can see on every photo. Is a kind of Ghost but I'm can't find it

Moderator edit: subject for clarity 

[LiliyaFitbit]

Welcome to the Fitbit Community, @Fvanhove.

Thanks for the details shared in your post. It's seems you're looking for the Fred clock face. You can change the clock face on Ace 2 by doing the following:

• With the tracker nearby, from the Fitbit app dashboard, tap the account icon> Ace 2 tile.
• Tap Clock Faces > All Clocks.
• Browse the available clock faces. Tap a clock face to see a detailed view.
• Tap Select to add the clock face to Ace 2. Sync the tracker. 

You can find more information about the Ace 2 and its features at How do I get started with Fitbit kids devices?

I'll be around if you need further help.