A display device including a plurality of sensing units, a plurality of first sensing signal lines, a first output unit, a first sensing output line, and a sensing signal processor. At least one flat ribbon cable, which is equipped with electrical conductors, runs in turns and forms a wound body, is arranged within the cassette between the terminals, the ends of the flat ribbon cable being connected to contact parts for the purpose of connecting ongoing cables. The method also includes converse modeling of the performance and behavioral profile of items offered as a function of consumer activity. A displacement sensor measures the displacement of the reaction force receiving member, thereby detecting the pressing force of the friction pad.