A call button module accommodates one, two, three or four buttons. Larger residential complexes are catered for by simply combining several modules.
The Vario principle is as ingenious as it is simple: It is based on functional modules and a design grid. Within the grid, the modules can be arranged in any combination. The result is a neatly arranged, aesthetically pleasing communication system every time. Everything is in perfect alignment and the proportions are right - even when large info signs or letterboxes are integrated.