The PARAGON Galvanic Skincare System's current is a low level or direct current used for disincrustation and iontophoresis. Disincrustation facilitates deep pore cleansing by a chemical process known as saponification. Iontophoresis introduces water soluble products deep into the skin. Polarity can be changed simply by the flip of a switch and a rheostat knob allows for intensity control. Still made in America, this unit is built by seasoned technicians and built to last. If you're looking for a unit that will you can retire with, look no further than the PARAGON 205 Galvanic Skincare System.