The form, function and design of our communication systems adapt in line with the needs and preferences of their owners. This is made possible by the sandwich-type structure: The main body of the housing is made of translucent plastic and is fitted with a panel at the back whose material and surface determine the character of the device. The design deliberately resists the trend towards miniaturization, and is oriented towards fulfilling physiological needs. The receiver, buttons, monitors and inscription fields are designed for easy, secure operation.