How to implement? the group is not visible if the width is equal to or less than 320 pixels

How to implement? the group is not visible if the width is equal to or less than 320 pixels, show an example in the pictures.

In the group conditions,
When page width < 320
This group is visible [Leave un-ticked].

and where to write it?

In the conditions tab of that group


Uploading: 111.png…

it doesn’t work

Все заработало спасибо

It should be a < instead of a >

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