The  “CORDLESS” Battery Operated Home Colloidal Silver Generator The entire unit sits on top of the glass, making electrode spacing uniform and automatic. It is completely portable, about the size of 2 stacked cell phones and  is strictly battery operated. It runs on three standard 9-volt batteries, which come  already installed, but may be replaced when they wear out. (two months to  two years, depending on usage.).  Includes 2×6″ 14 gauge silver wires