Administration forms for application to the skin or mucosa, comprising a carrier matrix and at least one active substance, are characterized in that the carrier matrix has a plurality of particles having open pores or containing capillary spaces, said particles serving as active substance reservoir and containing at least one active substance. The member includes a thin, flexible wall defining an opening. Each housing may have a keyboard and a display. The receiver module receives, with a first receiver electrode, a first resulting signal including effects of the first voltage gradient, and to receive, with a second receiver electrode, a second resulting signal comprising effects of the second voltage gradient.