External audio unit for surface mounting with 2 columns of bell push buttons, 20 mm
The solid unit for surface mounting, which is completely finished in up to 7 mm thick aluminium, is equipped with an adjustable microphone and loudspeaker as well as text fields for personalisation provided with vandal-proof plexiglas (5 mm thick). The maintenance-free, gold-plated push-button contacts guarantee a long lifespan. The push buttons can also be used for switching the light. The unit for surface mounting has two columns of bell push buttons, and is therefore suitable for large housing complexes. This device is available with maximum 92 bell push buttons by means of the extension modules. The extension module has the same finish as the external unit. Since the module is opened at the bottom, it has to be mounted sidelong on the external unit.