Device Group in Scenes (what's the purpose ???)

[Renaixsence 1]

I connected all my blinds to a Walli Roller Shutter.

Everything works fine but when I want to create a scene to close all the blinds at once with the push of 1 button and I want to do so with a scene with the "Device Group "Walli Roller Shutter"" I have to define every single blind separately ….

What is the difference between Single Device and Group Device ?????

 

Why can't I use Group Device, select Walli Roller Shutter and define the action (Close in this case) for the whole group ?

 

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As you can see in the image I have to define which blind in the group I want to use and can not choose all blinds at once so I don't see the difference with a single Device

 

 

[Renaixsence 1]

I found the answer myself.

 

You can chose different blinds in the choose listbox ?

 

My mistake ?