The products are made up of experiment box base, electrobath, wiring device and so on. The box seat size about 125 x 60 x 150mm; the cell comprises a box seat and a rubber cushion cover, rod and connecting line. Cell size is 45 x 25 x 46mm; two element size is 4 x 45mm; connecting line adopts multi strand copper core insulation wire length is not less than 100mm.