The generating idea of this project, which appeared for the first time in the furnishings of Casa Albini in 1938, was to fit the technological components of the radio between two thick sheets of crystal, thus stripping the technological attributes and freeing the radio instrument. of the heavy dress that was customary to put on him, disguising him as a wooden piece of furniture. The radio object then fits into the crystal that served to support it, but above all to expose its mechanisms, to make visible what had always been hidden, minimizing the "container" to emphasize the "content". Although subsequently elaborated in several similar versions between 1938 and 1940, the mobile radio has become an object-symbol of the constant search for the dematerialization of objects, of that enhancement of the "void" that Albini pursues in his idea of design, which seems poetically abstract from the cultural context prevailing in those years.