An assembly of nonimplantable devices intended to apply multiple electrotherapy modalities [e.g., transcutaneous electrical nerve stimulation (TENS), galvanic stimulation, medicinal electrophoresis (iontophoresis), interferential current] to various parts of the body for the treatment of multiple types of conditions (e.g., gynaecological, proctological, dermatological, neurological, dental and ENT). It consists of an electrically-powered control unit/generator and a handpiece with dedicated applicators/probes.