A method and system of conditioning human skin and hair using a hand-held skinhair conditioner having interchangeable interface conductors that are contoured to enhance electrical conductivity between the conditioner and a variety of body areas. , the melting point being defined as a top of a peak observed on a highest-temperature side in a melting endothermic curve obtained by a differential scanning calorimeter when a sample is held in a nitrogen atmosphere at \u221210\xb0 C. The display screens may include a plurality of predefinedadjustable edge portions, such that each edge portion is designated as a rocker edge portion. The first heavily doping region and the second heavily doping region, which are separated from each other, are disposed in the first well. A length, in a first direction intersecting a penetrating direction through which the eccentric pin penetrates, of the first concave groove is greater than a length, in a second direction intersecting the first direction and the penetrating direction, of the first concave groove.