The Roca in-wash shower toilet.

The Inspira wall hung pan featured above also uses the In-Tank system designed by Roca.  In this design the flush water is stored within the pan body so a cistern is not required.  Notice the absence of a flush plate in the photograph.  

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The Roca In-Tank system.

With In-Tank no cistern is required.  Water for flushing the toilet is stored within the body of the pan ans shown in the diagram above.

Two flush buttons are integrated into the side of the pan near to the back edge.

The flush water is forced into the bowl by an injection of air when a flush button is pressed.  This results in an efficient and very quiet flush.